Trump Impeachment Investigative Plan: Witnesses & Evidence
A Congressional Investigative Plan for the Model Articles of Impeachment Against President Trump
In short: This plan maps each of the seven model articles of impeachment against President Donald J. Trump to the House and Senate committees best placed to investigate them. For each article, it lists potential witnesses, documents to request or subpoena, and other lawful investigative steps. Everything is drawn from the public record as of November 3, 2026: court rulings, filings, official statements, and contemporaneous reporting. The plan is a starting point for committee staff, not a conclusion. Its purpose is to find out what happened, and that includes evidence that may support or undercut any article.
Democrats won control of both the House and the Senate in the November 3 midterm elections, as reported by the Associated Press. When the 120th Congress convenes on January 3, 2027, the new majorities will organize every committee. The committees listed below will then have chairs able to issue subpoenas, schedule hearings, and take depositions under their rules. As a result, committees in both chambers can carry out the steps in this plan with their full compulsory powers. The plan applies the same rules any majority of either party would use.
Key facts at a glance
What it is | A committee-by-committee roadmap for investigating the seven model articles |
Who it's for | Members, committee staff, and counsel in the 120th Congress, which convenes January 3, 2027 |
Committees covered | House: Judiciary, Oversight, Armed Services, Intelligence, Homeland Security, Foreign Affairs, Ways and Means, Financial Services, House Administration. Senate: Judiciary, Armed Services, Homeland Security and Governmental Affairs (including the Permanent Subcommittee on Investigations), Finance, Foreign Relations, Banking, Intelligence, Rules |
What's included | Potential witnesses, documents to request or subpoena, and other lawful steps for each article |
Basis | Public court records, official statements, and reporting as of November 3, 2026 |
Cost and terms | Free to use, in whole or in part, without permission |
A note on names: the officials listed below are named because public records tie their offices to the events described. Listing someone as a potential witness is not an accusation of wrongdoing. Many would be fact witnesses whose testimony could help the Administration's account as easily as it could hurt it.
What lawful tools can congressional committees use?
Congress's power to investigate is broad but not unlimited. The Supreme Court has recognized it as "an essential and appropriate auxiliary to the legislative function" (McGrain v. Daugherty, 273 U.S. 135 (1927)). It must serve a valid legislative or impeachment purpose (Watkins v. United States, 354 U.S. 178 (1957)). Subpoenas for a President's personal records must also satisfy the four-part test in Trump v. Mazars USA, LLP, 591 U.S. 848 (2020).
The tools available include:
Preservation letters to agencies, the White House, the National Archives, and private entities, sent before any request that might prompt destruction.
Voluntary requests for documents and transcribed interviews, which often produce faster results than subpoenas.
Subpoenas for documents and testimony, under each committee's rules (House Rule XI, cl. 2(m); Senate committee rules).
Depositions taken by committee counsel under House deposition regulations.
Public hearings, including field hearings in affected communities.
Inspector General requests, asking agency IGs to review specific matters (Inspector General Act, 5 U.S.C. §§ 401–424).
Government Accountability Office audits and legal decisions, including appropriations-law decisions (31 U.S.C. §§ 712, 3529).
Congressional Research Service analysis for Members and staff.
Tax information obtained by the House Ways and Means or Senate Finance Committee under 26 U.S.C. § 6103(f). The D.C. Circuit upheld the Ways and Means Committee's request for the President's returns in 2022 (Committee on Ways & Means v. U.S. Department of the Treasury, 45 F.4th 324).
Court records: filings, transcripts, and exhibits from the many pending cases, including motions to unseal where appropriate.
Immunity orders for witnesses who invoke the Fifth Amendment (18 U.S.C. §§ 6002, 6005). Use these sparingly, after notice to the Justice Department, because immunized testimony can impede later prosecutions.
Enforcement of subpoenas through civil litigation, or a referral for criminal contempt (2 U.S.C. §§ 192, 194).
Realistic limits. Subpoena power belongs to the majority. Because control of both chambers changed in the November 3, 2026 elections, the new majorities will organize committees in January 2027, and their chairs will hold subpoena authority under each committee's rules. Executive privilege claims and court fights can take months or years. The House's 2019 lawsuit to enforce Don McGahn's subpoena ran roughly two years. Committees should therefore lean first on what is already public or obtainable without litigation: court records, inspector-general work, agency records released under FOIA, and voluntary witnesses. Every refusal should be documented. A record of requests, offers to accommodate, and refusals supports enforcement in court and can itself become evidence of obstruction.
Which committees should lead on each article?
The House Judiciary Committee has jurisdiction over impeachment and would draft and report any articles. Other committees develop the facts within their own jurisdiction and transmit their findings to Judiciary, as the House did in 2019. Senate committees have no role in impeachment itself, since the Senate sits as the trial court. They can, however, conduct parallel oversight within their legislative jurisdiction.
Article | Lead House committee | Supporting House committees | Senate oversight counterparts |
I. Weaponizing law enforcement against opponents, critics, and the press | Judiciary | Oversight; Intelligence; Armed Services (Kelly matter) | Judiciary; Armed Services |
II. Settlement of the President's own lawsuit and the $1.776 billion Fund | Judiciary | Ways and Means; Oversight; Appropriations | Finance; Judiciary; HSGAC |
III. Foreign and domestic emoluments and entanglements | Oversight | Foreign Affairs; Financial Services; Ways and Means; Armed Services (aircraft) | Foreign Relations; Banking; Finance; HSGAC / PSI |
IV. War powers and domestic use of the military | Armed Services | Foreign Affairs; Intelligence; Judiciary (Posse Comitatus) | Armed Services; Foreign Relations; Intelligence |
V. Defiance of courts and deprivation of due process | Judiciary | Homeland Security; Oversight | Judiciary; HSGAC |
VI. Corruption of elections | House Administration | Judiciary; Oversight; Appropriations | Rules and Administration; Judiciary; HSGAC |
VII. Taxing power and tariffs | Ways and Means | Judiciary | Finance |
Which House and Senate committees can investigate these matters?
With the change in control, each of these committees can use its full investigative powers from the start of the 120th Congress.
Chamber | Committee | Relevant jurisdiction |
House | Judiciary | Impeachment; the Justice Department and FBI; federal courts; immigration law; Posse Comitatus |
House | Oversight and Government Reform | Government-wide oversight; emoluments; ethics; federal spending; the Presidential Records Act |
House | Armed Services | The Department of Defense; military operations; National Guard deployments; civilian-harm programs |
House | Permanent Select Committee on Intelligence | Intelligence on Iran, Venezuela, and the boat strikes; classified legal opinions |
House | Homeland Security | DHS, ICE, CBP, and Border Patrol operations; use of force; detention |
House | Foreign Affairs | Foreign gifts; special envoys; war powers resolutions; the State Department |
House | Ways and Means | Tax information under 26 U.S.C. § 6103(f); the IRS settlement; tariffs |
House | Financial Services | Digital assets and stablecoins; bank charters; suspicious-activity reports |
House | House Administration | Federal elections; election administration |
House | Appropriations | The Judgment Fund; appropriations used for advertising, deployments, and operations |
Senate | Judiciary | The Justice Department and FBI; nominations of U.S. Attorneys and Justice officials; immigration |
Senate | Homeland Security and Governmental Affairs, including the Permanent Subcommittee on Investigations | Government-wide oversight; financial and ethics investigations; DHS |
Senate | Armed Services | The Department of Defense; military operations; nominations of senior officers |
Senate | Select Committee on Intelligence | Intelligence assessments and classified programs |
Senate | Foreign Relations | Foreign policy, envoys, foreign gifts, and war powers |
Senate | Finance | Tax information under 26 U.S.C. § 6103(f); the IRS; tariffs and trade |
Senate | Banking, Housing, and Urban Affairs | Digital assets; bank regulators; Treasury financial-crimes data |
Senate | Rules and Administration | Federal elections; the Senate's own impeachment-trial rules |
Senate | Appropriations | Funding conditions across all affected agencies |
A phased sequence
Days 1–10 after January 3, 2027: preserve. Send preservation letters to every agency, office, and private entity named below. Ask the National Archives to confirm that Presidential Records Act obligations are being met.
Weeks 1–6: gather what is already public or available. Collect court records, inspector-general reports, GAO decisions, FOIA productions, and agency disclosures. Make voluntary requests to agencies and witnesses. Invite former officials and state officials, who often testify willingly.
Weeks 4–12: compel what is refused. Issue subpoenas for withheld documents and testimony. Document each accommodation offered and each refusal.
Months 3–6: public hearings. Hold hearings organized by article, beginning with matters where courts have already made findings.
Months 5–8: report. Committees transmit findings to Judiciary. Judiciary decides which articles the record supports, revises or drops the rest, and holds markup.
Article I: use of federal law enforcement against opponents, critics, and the press
Lead: House Judiciary. Support: Oversight; Intelligence; Armed Services. Senate: Judiciary; Armed Services.
Central questions. Did the President direct or influence investigations or prosecutions of specific people because of their speech, politics, or past role in investigating him? Who in the Justice Department approved each step, and on what evidence?
Potential witnesses
Former Attorney General Pam Bondi, to whom the President addressed public demands to prosecute named opponents
Attorney General Todd Blanche, who was Acting Attorney General when Mr. Comey was indicted in April 2026 and when New York Times reporters were subpoenaed in July 2026
The former U.S. Attorney for the Eastern District of Virginia who, according to the court record, raised concerns about charging Mr. Comey and New York Attorney General Letitia James
Lindsey Halligan, whose appointment as interim U.S. Attorney a federal court held unlawful
The prosecutors and supervisors who approved the April 2026 Eastern District of North Carolina indictment of Mr. Comey
The U.S. Attorney's office and Main Justice officials who sought grand jury subpoenas to the Federal Reserve Board, and the Board's General Counsel
FBI Director Kash Patel, regarding the February 2026 dismissal of nine agents and analysts
Secretary of Defense Pete Hegseth and Secretary of the Navy John Phelan, regarding the censure of Senator Mark Kelly
White House Press Secretary Karoline Leavitt and Press Office staff, regarding the September 18, 2026 credential revocations
Voluntary witnesses: affected law firms, the dismissed FBI employees, journalists, and Senator Kelly. Journalists should be invited, never compelled, and never asked about confidential sources.
Documents to request or subpoena
Communications between the White House and the Justice Department about investigating or prosecuting Mr. Comey, Ms. James, Senator Adam Schiff, or other named critics
Personnel and appointment records for the Eastern District of Virginia, including any declination memoranda
Charging and approval memoranda for both Comey indictments
The predication memo, approvals, and White House communications for the Federal Reserve subpoenas
The Attorney General's authorizations under 28 C.F.R. § 50.10 for subpoenas to journalists and their telephone records, together with the nondisclosure-order applications
Drafting files for Executive Orders 14230, 14246, 14250, and 14263; criteria for selecting law firms; and records of the nine firm settlements
FBI termination letters and decision memoranda for the nine dismissed employees
The Kelly censure file, the Navy's retirement-grade proceedings under 10 U.S.C. § 1370, and approvals for the Department's November 24, 2025 social-media post
The decision record for the White House press-credential revocations
The record behind the "supply chain risk" designation of Anthropic. Disclosure: this plan was prepared with the assistance of Anthropic's AI system, Claude, so committees should evaluate this item independently.
Other lawful steps
Obtain transcripts and exhibits from CNN v. Trump (D.D.C.), the Comey cases, the Federal Reserve subpoena matter, and the law-firm cases now on appeal in the D.C. Circuit.
Seek the internal Justice Department communications that the Southern District of New York ordered produced in the Times subpoena matter (No. 26-mc-352).
Ask the Justice Department Inspector General and the Office of Professional Responsibility to review the Comey, Federal Reserve, and journalist subpoenas.
Request a Congressional Research Service history of presidential involvement in individual prosecutions.
Article II: the settlement of the President's lawsuit against the IRS and the $1.776 billion Fund
Lead: House Judiciary. Support: Ways and Means; Oversight; Appropriations. Senate: Finance; Judiciary; HSGAC.
Central questions. Why did no government lawyer defend the United States for 109 days? Who negotiated and approved the settlement and the release of claims? Was the Judgment Fund lawfully available to pay future, unidentified claimants? What role did the President or his personal lawyers play?
Potential witnesses
Attorney General Todd Blanche, who signed the May 18, 2026 order creating the Fund and, as Acting Attorney General, the release of claims
Associate Attorney General Stanley Woodward Jr. and IRS Chief Executive Officer Frank Bisignano, reported signatories of the settlement agreement
Former Treasury General Counsel Brian Morrissey, who resigned after the settlement was announced
Treasury Secretary Scott Bessent and Bureau of the Fiscal Service officials responsible for Judgment Fund certifications
Career Civil and Tax Division attorneys assigned to Trump v. IRS
Voluntary witnesses: the independent amici appointed by the court, and former Justice Department officials who sought to reopen the case
Documents to request or subpoena
The settlement agreement, release, May 18 funding order, August 2 rescission order, and all drafts
Judgment Fund certification requests and Fiscal Service records, including any "designated account"
The IRS's reported internal defense memorandum
Assignment and case-handling records explaining the government's non-appearance
Communications between the President's personal counsel and the Justice Department, Treasury, or IRS
Ethics and recusal determinations concerning the Attorney General's former representation of the President
Other lawful steps
Obtain the July 13, 2026 order and record in Trump v. IRS (S.D. Fla. No. 1:26-cv-20609), the Eleventh Circuit record (No. 26-12692), and the record in Floyd v. DOJ (E.D. Va.).
Request a GAO appropriations-law decision on the use of 31 U.S.C. § 1304 and the Antideficiency Act.
Ask the Justice Department Inspector General and the Treasury Inspector General for Tax Administration to review the settlement.
Through Ways and Means or Finance, use 26 U.S.C. § 6103(f), in closed session, to determine which tax matters the release affected.
Article III: foreign and domestic emoluments and entanglements
Lead: House Oversight. Support: Foreign Affairs; Financial Services; Ways and Means; Armed Services.
Senate: Foreign Relations; Banking; Finance; HSGAC and its Permanent Subcommittee on Investigations.
Central questions. What did the President, his family, or entities they control receive from foreign governments or from a State, and on what terms? Did any payment coincide with official action? Was the consent of Congress sought?
Potential witnesses
Secretary of the Air Force Troy Meink and Defense Department officials, about the acceptance, retrofit, and planned disposition of the Qatari 747-8
Secretary of State Marco Rubio and the Office of the Chief of Protocol, about foreign-gift reporting under 5 U.S.C. § 7342
The White House Counsel and the Director of the Office of Government Ethics, about any emoluments analysis or ethics waivers
Special Envoy Steven Witkoff and Jared Kushner, about their negotiating roles, disclosures, and any overlap with foreign investors in Mr. Kushner's firm
Principals of World Liberty Financial and of the Trump Organization, about the reported $500 million investment, the USD1 stablecoin, and payments to Trump-linked entities
Devin Nunes, Chief Executive Officer of Trump Media & Technology Group, about the Truth API subscription service
Trustees of the Donald J. Trump Presidential Library Foundation, about the Miami parcel and donor payments
Voluntary witnesses: Florida officials and Miami Dade College trustees; representatives of companies that paid the foundation to settle the President's personal lawsuits. Foreign officials cannot be compelled to testify, but may be invited.
Documents to request or subpoena
The Qatar aircraft acceptance agreement, legal opinions, security reviews, retrofit contracts and costs, and transfer plans
Foreign-gift records filed with the State Department
Ownership, investor, and payment records for World Liberty Financial and USD1, including flows to Trump-linked entities
Records of the MGX investment in Binance settled in USD1
Trust instruments and financial disclosures (OGE Form 278e) describing the President's holdings and income
The Miami parcel deed, appraisals, and approvals; the foundation's donor list and settlement payments
Truth API contracts, subscriber lists, pricing, and timing logs showing when posts reached subscribers and the public
Records of Mr. Kushner's appointment status and ethics clearances, and of Affinity Partners' sovereign investors
Other lawful steps
Ask Treasury's Financial Crimes Enforcement Network for relevant suspicious-activity reports, as House committees have obtained in past investigations.
Obtain the record of the Comptroller of the Currency's August 2026 conditional charter decision.
Obtain filings in Sistrunk Seeds v. Trump (S.D. Fla.), Greenberg v. Trump (D.D.C.), CREW v. Kushner (D.D.C.), and The Intercept v. Trump.
Hold a recorded vote on whether Congress consents to the Qatari aircraft. The Constitution makes Congress the body that grants or withholds consent.
Article IV: war powers and the domestic use of the military
Lead: House Armed Services. Support: Foreign Affairs; Intelligence; Judiciary. Senate: Armed Services; Foreign Relations; Intelligence.
Central questions. What legal authority did the Administration rely on for the boat strikes and the operations in Venezuela and Iran? What did officials know about imminence, targets, and civilian harm? How were the domestic Guard deployments decided, and were troops used for law enforcement?
Potential witnesses
Secretary of Defense Pete Hegseth
Chairman of the Joint Chiefs of Staff Gen. Dan Caine
Adm. Frank "Mitch" Bradley, who oversaw the September 2, 2025 follow-on strike
Adm. Alvin Holsey, former Commander of U.S. Southern Command, who retired early in the boat-strike campaign
The Commander of U.S. Central Command, about Iran operations and the Minab school strike
Joe Kent, former Director of the National Counterterrorism Center, about the imminence of any Iranian threat
Office of Legal Counsel and Defense Department General Counsel attorneys who prepared the legal justifications
The former Judge Advocates General of the Army, Navy, and Air Force
The Commandant of the Coast Guard, about law-enforcement alternatives to lethal force at sea
Governors Gavin Newsom, JB Pritzker, and Tina Kotek, and Guard commanders, about the federalization orders (voluntary)
Families of people killed in the strikes (voluntary)
Documents to request or subpoena
The August 5, 2025 execute order, targeting criteria, and strike logs for every strike
The unedited video of the September 2, 2025 strikes, and rescue and recovery records for all strikes that left survivors
The Office of Legal Counsel opinion on the boat strikes, and all legal memoranda for the Venezuela and Iran operations
War Powers Resolution reports and any certifications under section 5(b)
Intelligence assessments on any imminent threat before February 28, 2026
Civilian-casualty assessments, including for the Minab school strike, and civilian-harm program staffing and funding records
National Guard federalization orders, city-selection memoranda, and Posse Comitatus compliance records
Cost data for each operation and deployment
Other lawful steps
Hold classified briefings and closed hearings, with unclassified summaries released whenever possible.
Require the Defense Department's annual civilian-casualty report and review its accuracy.
Ask the Defense Department Inspector General and GAO to review the targeting process, civilian-harm safeguards, and deployment costs.
Obtain the trial record in Newsom v. Trump (N.D. Cal.) and the Ninth Circuit's October 23, 2026 opinion.
Follow the FOIA litigation in the Southern District of New York seeking the Office of Legal Counsel memo.
Article V: compliance with court orders and the guarantee of due process
Lead: House Judiciary. Support: Homeland Security; Oversight. Senate: Judiciary; HSGAC.
Central questions. Did officials knowingly act to evade court orders? Why was a closed criminal investigation of Kilmar Abrego Garcia reopened after the courts ordered his return? How many U.S. citizens have been detained, and under what policies? Why did federal agencies stop sharing evidence with Minnesota investigators?
Potential witnesses
Former Secretary of Homeland Security Kristi Noem and Secretary Markwayne Mullin
ICE and Border Patrol leadership responsible for Operations Metro Surge, Midway Blitz, and Charlotte's Web
White House Deputy Chief of Staff Stephen Miller, regarding the March 2025 Alien Enemies Act flights and the Abrego Garcia case (executive privilege claims are likely)
Attorney General Todd Blanche, regarding his public statements about the reopened Abrego Garcia investigation
Erez Reuveni, the former Justice Department attorney who acknowledged the Abrego Garcia removal error in court and later filed a whistleblower disclosure (voluntary)
The former Criminal Division chief in the Middle District of Tennessee who reportedly recommended against charging Mr. Abrego Garcia (voluntary)
Hennepin County Attorney Mary Moriarty and Minnesota Bureau of Criminal Apprehension officials (voluntary)
The ICE whistleblower who disclosed the home-entry memorandum (voluntary, with whistleblower protections)
Families of Renee Good, Alex Pretti, and Lorenzo Salgado Araujo (voluntary)
Documents to request or subpoena
Records of the March 15–16, 2025 removal flights, including timing, decision-makers, and communications about the court's order
The Abrego Garcia removal file; the agreement with El Salvador and payments made under it; and the discovery withheld in the District of Maryland
Records of the April 2025 decision to reopen the Abrego Garcia investigation, and the prosecution memorandum
Drafting files and legal opinions for Executive Order 14160 (birthright citizenship)
The ICE memoranda of May 12, 2025 (home entry on administrative warrants) and January 28, 2026 (civil arrest authority), with related training materials
Data on U.S. citizens detained by immigration agents, including minors
Use-of-force reports, body-camera policies, and investigative files for the Minneapolis and Houston shootings
Records of the September 10, 2026 decision to pause evidence sharing with Minnesota
Other lawful steps
Obtain the records of contempt proceedings in J.G.G. v. Trump (D.D.C.), the Abrego Garcia cases in the District of Maryland and the Middle District of Tennessee, Minnesota v. DOJ, and Aceituno v. DHS.
Ask the DHS and Justice Department Inspectors General to review the citizen detentions and the Minnesota evidence decisions.
Hold a field hearing in Minneapolis with state and local officials.
Ask GAO to audit detention data and use-of-force reporting.
Article VI: interference in the administration of federal elections
Lead: House Administration. Support: Judiciary; Oversight; Appropriations. Senate: Rules and Administration; Judiciary; HSGAC.
Central questions. Who directed the new Postal Service ballot-mail rule and the California ballot lawsuit, and why on the eve of a federal election? On what data did the Justice Department rely? Who approved spending $20 million on advertising featuring the President before the midterms?
Potential witnesses
OMB Director Russell Vought, about the September 19, 2026 apportionment that funded the advertising
CBP Commissioner Rodney Scott and CBP contracting officials, about the purchase order and ad content
Postmaster General David Steiner and the USPS Board of Governors, about the ballot-mail rule and Executive Order 14399
Justice Department officials who authorized the October 15, 2026 California lawsuit, and the analysts who built the voter-matching list
California Secretary of State Shirley Weber and county election officials (voluntary)
The Special Counsel of the Office of Special Counsel, about Hatch Act complaints, including the Secretary of Defense's May 18, 2026 campaign appearance
Documents to request or subpoena
The drafting file for Executive Order 14399 and the Postal Service rulemaking record, including whether the Postal Regulatory Commission process under 39 U.S.C. § 3661 was considered
The voter-matching methodology, data sources, error rates, and validation for the California list
Communications about the timing of the California lawsuit
OMB apportionment footnotes, the CBP purchase order, ad scripts, and approval chains
Travel, legal-clearance, and scheduling records for the Secretary of Defense's campaign appearances
Drafting files for the March 31, 2026 executive order on elections and citizenship
Other lawful steps
Request a GAO decision on whether the advertising violated the purpose statute (31 U.S.C. § 1301(a)) and the appropriations ban on publicity or propaganda.
Obtain records from Common Cause v. DHS (S.D.N.Y.), the USPS case (No. 26A305), and United States v. California (C.D. Cal.; No. 26A624).
Hold a hearing with state and local election administrators of both parties on the operational effects of federal actions in 2026.
Article VII: emergency tariffs and the taxing power
Lead: House Ways and Means. Support: Judiciary. Senate: Finance.
Central questions. After the Supreme Court held on February 20, 2026 that IEEPA does not authorize tariffs, how did the Administration respond? Are refunds being paid as required?
Potential witnesses: U.S. Trade Representative Jamieson Greer; Commerce Secretary Howard Lutnick; Treasury Secretary Scott Bessent; the CBP Commissioner, about refunds; and importers and trade associations (voluntary).
Documents to request or subpoena: legal opinions supporting the IEEPA tariffs and the replacement tariffs under Sections 122, 301, and 338; internal communications about responding to Learning Resources, Inc. v. Trump; and refund-processing data.
Other lawful steps: ask GAO to audit refund compliance; request Congressional Budget Office and CRS analysis; and follow the Court of International Trade litigation over the Section 122 surcharge. Because the tariffs were defended on a colorable reading of statute, this article warrants investigation chiefly for evidence of deliberate evasion of the Supreme Court's judgment.
What role can Senate committees play?
The Senate tries impeachments, so Senators act as jurors if articles are exhibited. Senate committees should therefore frame their work as ordinary legislative oversight, not as a parallel impeachment inquiry. Within that frame, they have real tools:
The Permanent Subcommittee on Investigations of the Homeland Security and Governmental Affairs Committee has long conducted bipartisan, document-intensive investigations of financial and governmental misconduct. That makes it well suited to the emoluments and settlement questions.
Senate Finance shares the House Ways and Means Committee's access to tax information under 26 U.S.C. § 6103(f).
Senate Armed Services and Senate Intelligence receive classified briefings and can compel testimony from military and intelligence officials.
Senate Judiciary confirms Justice Department nominees and U.S. Attorneys. It can obtain commitments on independence, recusal, and cooperation with oversight as a condition of confirmation.
Appropriations subcommittees in both chambers can condition funding on producing records, preserving evidence, and complying with court orders.
With the change in Senate control, these committees can issue subpoenas and compel testimony under their rules beginning in January 2027. Because Senators may later sit as jurors, Senate committees should keep their work tied to legislative purposes: funding, statutory reform, confirmations, and oversight of agency compliance.
How can committees protect witnesses and keep the inquiry fair?
An inquiry that is seen as fair is far more persuasive to the public and to the Senate. Committees should:
Protect whistleblowers. Remind agencies of the protections in 5 U.S.C. § 2302(b)(8)–(9) and 18 U.S.C. § 1505, and ask inspectors general to report any retaliation.
Respect the press. Invite journalists only voluntarily, and never ask them to identify confidential sources.
Coordinate before granting immunity. Give the Justice Department the statutory notice and weigh the effect on any later prosecution (United States v. North, 910 F.2d 843 (D.C. Cir. 1990)).
Handle classified and tax information properly. Use closed sessions, cleared staff, and release unclassified summaries.
Include the minority. Give minority members equal time, notice of depositions, and access to evidence, following the procedures in H. Res. 660 (116th Congress).
Follow the evidence both ways. Record evidence that supports the Administration's account as carefully as evidence against it. Drop or revise any article the record does not support.
Give the President an opportunity to respond. As in 2019, offer the President's counsel the chance to present evidence and question witnesses before the Judiciary Committee.
About the Biazzo Law Government Oversight Program
The Biazzo Law Government Oversight Program is a nonpartisan public-service initiative. It promotes constitutional accountability through lawful, peaceful, and fact-based means. The program monitors the use of government power, explains pending constitutional questions in plain language, pursues public records under FOIA, and files amicus briefs in significant cases. Its FOIA work with DHS, ICE, the FBI, and the Defense Department has already produced records that bear on several of the matters above.
This investigative plan, like the model articles of impeachment, may be used freely, in whole or in part. If your office or committee would like to talk through the plan, the underlying cases, or how to sequence the work, I am glad to set up a time.
Corey J. Biazzo, Esq. · Biazzo Law, PLLC corey@biazzolaw.com · (703) 297-5777 · Request a time to talk
Related analysis
Companion resources: Model Articles of Impeachment Against Trump: 120th Congress · How Impeachment Works and Why It Matters Without Conviction · Follow the Money: Why Congress Must Investigate in 2027 · Vote for Accountability: Why Congressional Oversight Matters
Article I: Executive Orders Against Law Firms · The Comey "Seashell" Case · Powell Subpoenas Quashed · NYT Subpoenas Withdrawn · Nine FBI Agents Sue · The Mark Kelly Case · White House Press Ban
Article II: Can Congress Investigate the Anti-Weaponization Fund? · Criminal Exposure Over the Fund Settlement? · Open Letter on the Blanche Nomination
Article III: Emoluments Clause and the Trump Library · Trump Crypto Deals · Truth Social · CREW v. Kushner
Article IV: Boat Strikes and Due Process · War Powers After 2026 · Iran · The Maduro Seizure · National Guard in U.S. Cities
Article V: Abrego Garcia and Due Process · Good and Pretti Killings · Minnesota v. DOJ & DHS · ICE Home-Entry Policy · FOIA Lawsuits: What We Found
Article VI: USPS Ballot Mail Case · California Ballot Demand · Taxpayer-Funded Ads
Article VII: Who Has the Power to Tariff?
Frequently asked questions
Which committees can investigate these matters after the 2026 midterm elections? Democrats won control of both chambers on November 3, 2026. Beginning January 3, 2027, House committees, including Judiciary, Oversight, Armed Services, Intelligence, Homeland Security, Foreign Affairs, Ways and Means, Financial Services, and House Administration, can investigate with full subpoena power. So can Senate committees, including Judiciary, Homeland Security and Governmental Affairs and its Permanent Subcommittee on Investigations, Armed Services, Intelligence, Foreign Relations, Finance, Banking, and Rules.
Which House committee leads an impeachment investigation? The House Judiciary Committee drafts and reports articles of impeachment. Other committees, such as Oversight, Armed Services, and Intelligence, can investigate matters within their jurisdiction and transmit their findings to Judiciary, as the House did in 2019.
Can Congress subpoena a President's personal financial records? Yes, within limits. Under Trump v. Mazars USA, LLP (2020), a committee must show a valid legislative purpose, show that the information is not reasonably available elsewhere, keep the request no broader than necessary, and support it with detailed evidence. Impeachment inquiries rest on a separate constitutional power, which may strengthen a committee's position.
Can a congressional committee obtain the President's tax returns? The House Ways and Means and Senate Finance Committees may obtain tax returns under 26 U.S.C. § 6103(f). The D.C. Circuit upheld the Ways and Means Committee's request for the President's returns in 2022.
What happens if the Administration refuses a subpoena? The committee can seek enforcement in federal court, refer the matter for criminal contempt under 2 U.S.C. §§ 192 and 194, or use the refusal as evidence. In 2019, the House adopted an article of impeachment for obstruction of Congress based on refusals to comply with subpoenas.
What can Senate committees do? The Senate tries impeachments, so Senate committees should focus on ordinary legislative oversight. Within that role, committees such as the Permanent Subcommittee on Investigations, Finance, and Armed Services can gather records, hold hearings, and support GAO and inspector-general reviews.
Does naming someone as a potential witness mean they did something wrong? No. Witnesses are listed because public records connect their offices to the events. Many are fact witnesses whose testimony could support the Administration's account.
Is this plan partisan? No. It applies the same lawful investigative tools Congress has used under Presidents of both parties, and it directs committees to follow the evidence wherever it leads.
This investigative plan is provided for public education and to assist Members of Congress and their staff. It is not legal advice and does not create an attorney-client relationship. It is based on the public record as of November 3, 2026. Identifying a person as a potential witness is not an allegation of wrongdoing. No court has found that the President committed a crime during his second term, and every person is presumed innocent unless and until proven guilty in a court of law.
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