Biazzo Law Files Supreme Court Amicus Brief in USPS Ballot Mail Emergency Docket Case
- Corey J. Biazzo, Esq.
- 2 days ago
- 10 min read
By Biazzo Law, PLLC
Updated September 5, 2026
Biazzo Law has filed an amicus curiae brief in the United States Supreme Court in United States Postal Service, et al. v. California, et al. / Donald J. Trump, et al. v. League of Women Voters of Massachusetts, et al., No. 26A297.
The case is the latest emergency-docket dispute arising from Executive Order 14,399, the Postal Service’s new Ballot Mail for Federal Elections final rule, and the rules governing mail-in and absentee ballots for the 2026 federal election.
Read Biazzo Law’s filed Supreme Court amicus curiae brief here:
Biazzo Law previously covered the earlier Supreme Court emergency docket phase in Trump v. California here:
This case also fits squarely within the mission of the Biazzo Law Government Oversight Program, which focuses on nonpartisan constitutional accountability, separation of powers, agency authority, federalism, emergency litigation, and lawful limits on government power:
Quick Answer: What Is This New Supreme Court Case About?
This case is about whether the Postal Service may immediately enforce a new nationwide rule governing federal ballot mail shortly before the 2026 midterm election.
The Government argues that the rule is a lawful and modest exercise of USPS authority over mail processing. It says the rule concerns envelope design, barcode information, and ballot-mail preparation—not voter eligibility, ballot counting, or state election administration.
The respondent States and organizations argue that the rule imposes new mandatory requirements too close to the election, including envelope approval, voter-linked data uploads, and use of a USPS online portal before ballot mail can be accepted. They also argue that the rule risks disruption, confusion, and voter disenfranchisement.
Biazzo Law’s amicus brief focuses on a narrower issue:
Whether 39 U.S.C. § 3661 required the Postal Service to submit the final rule to the Postal Regulatory Commission for an advisory opinion before making the rule effective.
How This Case Relates to Trump v. California
This case follows the earlier emergency docket ruling in Trump v. California, No. 26A124.
In that earlier case, the Supreme Court stayed an injunction against parts of Executive Order 14,399. The Court reasoned that the challenge was premature because, at that point, the Postal Service had not yet issued a final rule. The Court emphasized that federal courts review concrete agency action, not a chain of speculation about what a future rule might say.
That has now changed.
The Postal Service has issued a final rule titled Ballot Mail for Federal Elections. The new emergency case asks whether the district court properly entered temporary relief against mandatory enforcement of that final rule.
That makes this case different from the earlier Trump v. California emergency filing. The earlier case involved a challenge before the final USPS rule existed. This case involves the final rule itself.
What Does the USPS Final Rule Do?
The final rule creates new requirements for federal ballot mail sent through the U.S. Mail.
According to the Government’s application, the rule requires federal-election ballot envelopes to include the official Election Mail logo, be automation-compatible, and use unique barcodes connected to ballot-mail status and delivery-point information.
State and local election officials must submit envelope designs to USPS for review. They must also provide USPS with certain ballot-mail information, including names, addresses, states, and barcode information for intended ballot recipients.
When outbound ballot mail is presented for mailing, USPS verifies whether barcode data matches portal data. If the mailing does not comply, the rule provides that the mailing will be returned to the authorized ballot mailer so the problem can be corrected and resubmitted.
The Government says USPS will not decide who is eligible to vote. The Government’s position is that States retain control over voter eligibility, mail-voting eligibility, voter rolls, ballot counting, and state election administration.
The challengers disagree with the practical effect of the rule. They argue that the rule imposes new federal preconditions on the use of mail for election ballots and that, because of the compressed timeline, compliance may be practically impossible for some jurisdictions.
What Did the District Court Do?
The United States District Court for the District of Massachusetts entered temporary relief against certain mandatory provisions of the final rule for the November 3, 2026 election.
The order did not prevent USPS from continuing to build its online portal or from communicating with States about design standards. It also did not prevent States from voluntarily participating.
Instead, the order paused the mandatory enforcement of key provisions while the court considered preliminary-injunction issues.
The Government then sought emergency relief from the Supreme Court.
What Is the Government Asking the Supreme Court to Do?
The Government is asking the Supreme Court to stay the district court’s order and allow the final rule to be enforced while litigation continues.
The Government argues that the district court’s order functions like an appealable injunction because it blocks mandatory implementation of a final federal rule on the eve of ballot mailing. It also argues that ordinary appellate review would come too late because some States begin mailing ballots before the litigation can proceed in the usual way.
The Government says the final rule is lawful because USPS has broad statutory authority to regulate the collection, handling, transportation, delivery, forwarding, returning, and holding of mail.
The Government also argues that the rule regulates the mail, not elections.
What Do the Respondents Argue?
The respondent States and organizations oppose immediate emergency relief.
They argue that the rule was published too close to the election and that it imposes major new obligations on state and local election officials.
They also argue that USPS’s online portal was not yet operational when the emergency dispute reached the Court, which they say undermines the Government’s claim of immediate irreparable harm.
Respondents further contend that compliance would require redesigning ballot envelopes, securing USPS approval, uploading voter-linked information, training election officials, coordinating local election systems, and doing all of that within a compressed pre-election timeline.
Their position is that the district court’s temporary order preserves the status quo while courts review whether the final rule is lawful.
What Does Biazzo Law’s Amicus Brief Argue?
Biazzo Law’s amicus brief supports the respondents and denial of the stay application.
The brief does not attempt to repeat every argument made by the parties. Instead, it focuses on a narrow statutory point:
Congress already prescribed a specific procedure for significant nationwide changes in postal service.
That procedure is found in 39 U.S.C. § 3661.
Section 3661 says that when the Postal Service determines there should be a change in the nature of postal services that generally affects service on a nationwide or substantially nationwide basis, it must submit the proposal to the Postal Regulatory Commission within a reasonable time before the proposal’s effective date.
The statute also requires an opportunity for an on-the-record hearing before the Commission issues its advisory opinion.
Biazzo Law’s brief argues that the final ballot-mail rule likely triggered this statute because it:
makes a meaningful change;
qualitatively changes the postal service available to users;
operates nationwide; and
was made immediately effective.
The brief argues that the Postal Service cannot make the required showing for emergency relief while defending immediate implementation of a rule that likely bypassed a specific procedure Congress required.
Why 39 U.S.C. § 3661 Matters
Section 3661 is important because it is not a broad policy preference. It is a specific procedural command
Congress wrote into postal law.
It does not give the Postal Regulatory Commission final veto power over USPS operations. The Commission’s opinion is advisory.
But the process matters.
Congress required advance submission, a public process, participation by users of the mail, participation by an officer representing the general public, and an advisory opinion before qualifying nationwide changes take effect.
That process protects public participation while preserving postal management authority.
Biazzo Law’s point is modest:
The question is not whether USPS may ever adopt ballot-mail processing requirements. The question is whether USPS had to follow Congress’s procedure before making this nationwide rule immediately effective.
What Is Buchanan v. Postal Service and Why Does It Matter?
The Biazzo Law brief relies heavily on Buchanan v. Postal Service, a Fifth Circuit case interpreting Section 3661.
Buchanan identified three requirements for Section 3661 to apply:
there must be a meaningful change;
the change must qualitatively alter the postal service available to users;
and the change must affect service on a nationwide or substantially nationwide basis.
Biazzo Law’s brief argues that the final ballot-mail rule satisfies those factors.
It is meaningful because it turns prior recommendations into mandatory conditions for accepting federal ballot mail.
It is qualitative because it changes the terms on which state and local election officials can access ballot-mail service.
It is nationwide because it applies to federal ballot mail throughout the country.
Why This Is Different From Ordinary Notice-and-Comment Rulemaking
The Government points to USPS’s broad operating authority and the Postal Service’s exemption from ordinary Administrative Procedure Act review.
Biazzo Law’s brief responds that Section 3661 is different.
Congress specifically preserved this Postal Service-specific process even while exempting USPS from many ordinary APA requirements. That means Section 3661 should not be treated as optional.
The brief argues that the Postal Service’s general power to issue rules is limited by the requirement that those rules be consistent with Title 39. Section 3661 is part of Title 39. A final rule that bypasses a required Section 3661 process is therefore not simply an ordinary exercise of general postal authority.
Why Executive Order 14,399 Does Not End the Inquiry
The final USPS rule traces back to Executive Order 14,399.
But an executive order cannot eliminate a statutory procedure Congress prescribed.
Biazzo Law’s brief relies on a basic separation-of-powers principle: executive action must operate within the authority Congress has provided. The President may direct executive officials to pursue lawful policies, but a presidential timetable cannot erase statutory conditions Congress placed on agency action.
That point is central to government oversight.
The issue is not whether election integrity matters. It does.
The issue is whether the Executive Branch and USPS must follow the procedure Congress required before imposing a significant nationwide change to ballot-mail service.
What Does This Mean for Voters and Election Officials Right Now?
For now, the case is in emergency posture.
That means the Supreme Court is not deciding the full merits in the ordinary way. It is deciding whether the district court’s temporary order should remain in place while litigation continues.
The practical stakes are immediate because some States begin mailing ballots weeks before Election Day.
If the Supreme Court grants a stay, USPS may be able to enforce the final rule while litigation continues.
If the Supreme Court denies a stay, the district court’s temporary relief remains in effect, at least for the time being, while the lower court addresses preliminary-injunction issues.
Either way, the case shows why emergency litigation can have major consequences before the merits are finally decided.
Why This Is a Government Oversight Issue
This case fits directly within the Biazzo Law Government Oversight Program:
Government oversight is not partisan. It is institutional.
It asks whether public power is being exercised lawfully, transparently, and within constitutional limits.
This case involves:
federal agency authority;
Executive Orders;
Congress’s prescribed procedures;
mail-in and absentee ballot systems;
state election administration;
the Postal Service’s nationwide operations;
emergency injunctions;
public participation in agency decision-making;
and the role of courts when government acts quickly before an election.
Those issues matter regardless of which party or administration is involved.
The rule of law requires that agencies follow the procedures Congress enacted, especially when new rules affect nationwide public services close to an election.
Why Biazzo Law Filed an Amicus Curiae Brief
An amicus curiae brief is a “friend of the court” brief filed by a nonparty who believes the court may benefit from an additional legal perspective.
A good amicus brief should not simply repeat the parties’ arguments. It should offer a useful, focused point that may assist the Court.
Biazzo Law’s brief focuses on Section 3661 because that issue was not fully developed in the Government’s application.
The brief argues that Section 3661 supplies the kind of specific statutory command that matters in this emergency posture. The Government’s stay application argues that respondents cannot identify a specific statutory prohibition against the USPS final rule. Biazzo Law’s brief responds that Section 3661 is that specific statutory command.
How This Builds on Biazzo Law’s Prior Work in Trump v. California
Biazzo Law previously filed an amicus curiae brief in Trump v. California, No. 26A124, concerning the earlier challenge to Executive Order 14,399.
That earlier brief focused on emergency-relief methodology. It argued that the Government should not be able to treat implementation as too speculative for standing and ripeness while also treating implementation as urgent and concrete enough to justify emergency relief before the election.
Read Biazzo Law’s prior coverage here:
The new brief addresses a later stage of the dispute. Now that USPS has issued a final rule, the question is not only whether the case is ripe. The question is whether USPS followed the statutory process Congress required before implementing a significant nationwide postal-service change.
Key Takeaway
The USPS ballot-mail case is not simply about whether election integrity matters or whether mail voting should exist.
It is about legal authority and process.
The Government says the final rule is a lawful exercise of USPS authority over the federal mail.
Respondents say the rule imposes disruptive new federal requirements too close to the election and exceeds USPS authority.
Biazzo Law’s amicus brief adds a narrow statutory point:
Before implementing a significant nationwide change to postal service, Congress required USPS to follow the Section 3661 process. If that process applies here, USPS could not make the final rule immediately effective without first submitting the proposal to the Postal Regulatory Commission within a reasonable time before implementation.
That is a rule-of-law issue.
When Congress prescribes a procedure, agencies must follow it.
Frequently Asked Questions
What case did Biazzo Law file in?
Biazzo Law filed an amicus curiae brief in United States Postal Service, et al. v. California, et al. / Donald J. Trump, et al. v. League of Women Voters of Massachusetts, et al., No. 26A297, before the United States Supreme Court.
What is the case about?
The case concerns the Postal Service’s final rule for federal ballot mail and whether the district court properly paused mandatory enforcement of key parts of that rule while litigation continues.
What does the USPS final rule require?
The rule requires certain envelope-design, barcode, portal, and ballot-mail data requirements for outbound federal-election ballot mail sent through USPS.
Does USPS decide who is eligible to vote under the rule?
The Government says no. Its position is that state and local election officials continue to decide voter eligibility, mail-voting eligibility, voter rolls, and ballot counting.
What do the challengers argue?
The challengers argue that the rule imposes new mandatory requirements too close to the election, risks disruption and disenfranchisement, and exceeds USPS authority.
What did Biazzo Law’s amicus brief argue?
The brief argues that 39 U.S.C. § 3661 likely required USPS to submit the rule to the Postal Regulatory Commission for an advisory opinion before making the rule effective.
What is 39 U.S.C. § 3661?
Section 3661 requires USPS to submit certain significant nationwide changes in postal service to the Postal Regulatory Commission before the changes take effect and provides for an on-the-record hearing process.
Does the brief argue USPS can never regulate ballot mail?
No. The brief argues that USPS must follow Congress’s required process before implementing qualifying nationwide changes. It does not argue that USPS can never adopt lawful ballot-mail processing rules.
Why is this linked to Biazzo Law’s Government Oversight Program?
The case involves agency authority, executive action, statutory procedures, election administration, emergency litigation, and whether government must follow the rules Congress enacted.
Where can I read Biazzo Law’s filed brief?
The filed Supreme Court brief is available here:
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