Supreme Court weighs USPS ballot rules as overseas deadline nears

The Supreme Court is weighing whether to let the U.S. Postal Service enforce new ballot-screening requirements just as Texas approaches an early deadline for sending military and overseas ballots.

The emergency case, United States Postal Service v. California, is docketed as No. 26A305. The Court docket shows the stay application was filed September 6, responses were filed September 9, and USPS filed its reply September 10. As of September 14, 2026, the docket did not list an order granting or denying the requested stay.

What the dispute is about

The case concerns a federal USPS rule tied to a broader dispute over whether the federal government can impose election-mail requirements on states and local election administrators.

If allowed to take effect, the rule would require election offices to use USPS-approved ballot-envelope designs, including voter-specific Intelligent Mail barcodes. Officials would also have to enroll mail voters and related ballot information through a federal Mail Ballot Portal.

Under the rule described in Harris County’s filing, USPS would review outgoing ballot mail for the required barcode and check it against information submitted by election officials before accepting the ballot mail. The Postal Service and related applicants are asking the Supreme Court to pause a preliminary injunction that currently blocks implementation while the case proceeds.

The Associated Press reported that an appeals court left the injunction in place, that the portal had not been activated, and that some states had already begun sending ballots. Those facts have intensified the timing concerns raised by election officials.

Why the timing matters in Texas

Harris County told the Supreme Court that Texas must begin sending military and overseas ballots on September 19, 2026. That date comes from the county’s filing and Texas election law; it is not a nationwide deadline.

The county argues that it cannot yet compile a complete list of voters for the proposed federal portal because voter registration and mail-ballot requests continue later in the election calendar. Harris County’s filing says Texas voters may request mail ballots through October 23, while the county must begin mailing certain military and overseas ballots more than a month earlier.

Harris County also says the proposed process would require daily portal updates, staff training, new envelope production and testing of ballot styles and barcode systems. Those are arguments and evidence submitted in the litigation, not judicial findings.

How many voters could be affected

Harris County reported that 47,584 eligible voters had requested mail ballots for the November 2026 election as of September 8. The county said it expected at least 30,000 additional requests before the October 23 deadline.

For comparison, the county reported 64,171 returned mail ballots in November 2022 and 66,085 in the November 2024 presidential election. The figures show the scale of Harris County’s mail-ballot operation, but they do not establish that ballots would automatically be rejected under the proposed USPS system.

Harris County argues that a ballot could be delayed or returned if the voter is not included on the submitted list or if the envelope does not meet USPS specifications. The county also argues that the rule does not provide voters with a clear notice-and-cure process if ballot mail is refused. Those claims remain part of the pending litigation.

What voters should watch

The immediate question is whether the Supreme Court leaves the injunction in place while the underlying authority dispute proceeds. An action on the emergency request could affect election-office planning before the Court makes a final decision on the legality of the rule.

Military and overseas voters should request and return ballots as early as their jurisdiction permits and follow instructions from their state or county election office or the Federal Voting Assistance Program. USPS says military and overseas ballot mail needs extra time, including for APO, FPO and DPO addresses, and recommends early mailing.

Domestic absentee voters should check their state or county election office for current envelope, mailing and ballot-return instructions before sending a ballot. State laws and deadlines vary, and the Texas September 19 overseas-ballot date should not be treated as a general deadline for ordinary domestic absentee voting.

Sources

• Supreme Court docket No. 26A305
• USPS election-mail guidance
• Associated Press court report

Look for updates to this story

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