US Supreme Court Rejects Trump’s Mail-In Voting Restrictions Ahead of 2026 Midterm Elections
The US Supreme Court has rejected the Trump administration’s request to put new restrictions on mail-in voting into effect before the November 2026 midterm elections, leaving in place a lower-court injunction that prevents the US Postal Service (USPS) from enforcing the new rules. The Court issued its emergency order on September 14, 2026.
The Court’s brief order said the government was “unlikely to succeed” on the merits of its challenge to the lower court’s preliminary injunction. It also concluded that the factors governing emergency relief did not support lifting the injunction at this stage.
The immediate consequence is that states can continue sending mail ballots under their existing procedures for the 2026 elections rather than adopting the new USPS requirements just weeks before voting. Mail voting has become a major component of US elections, accounting for roughly one-third of votes cast in recent elections.
The dispute stems from an executive order issued by President Donald Trump in March 2026 directing changes to the federal handling of election mail. Following that directive, the Postal Service adopted a final rule requiring election-related mail to meet specific envelope and identification requirements.
Under the USPS rule, states would have been required to use envelopes containing specified election-mail features, including a specialized barcode, and submit information about voters receiving mail ballots through a Postal Service system. Non-compliant mailings could be rejected and returned to the states for correction.
The administration argued that the Postal Service had statutory authority to regulate the design and handling of mail sent through the federal postal system. It maintained that states could not rely on USPS to deliver election materials while simultaneously claiming that the federal agency lacked authority to impose mail-related requirements.
Several states and voting-rights organisations challenged the restrictions, arguing that the changes exceeded presidential and USPS authority and interfered with the states’ constitutional role in administering elections. They also argued that implementing a new nationwide system so close to the midterm elections could disrupt legitimate ballots.
US District Judge Indira Talwani in Massachusetts issued an injunction blocking the USPS rule. She concluded that the challengers had raised substantial legal issues and that state and local election officials did not have sufficient time to implement the new requirements before the November election.
The Supreme Court’s latest order keeps that injunction in place while the underlying litigation continues. The ruling therefore addresses the implementation of the restrictions for the upcoming election rather than conclusively resolving every legal question surrounding the Postal Service’s authority to regulate election mail.
Justice Brett Kavanaugh agreed with denying the administration’s request for an immediate stay but wrote separately. He indicated that, based on the material before the Court, there could be a substantial argument that the Postal Service had statutory authority for the rule. However, he concluded that applying the rule during the 2026 elections would violate the Administrative Procedure Act because election officials lacked adequate time to implement it.
Justices Samuel Alito and Clarence Thomas dissented. Alito argued that the administration had made the showing necessary for the Supreme Court to stay the lower-court injunction and maintained that the Postal Service possesses broad authority over the mail.
The case has therefore produced an important distinction between the potential long-term authority of the USPS to regulate election mail and the legality of imposing the particular requirements immediately before the 2026 elections. Kavanaugh’s concurrence specifically leaves room for the underlying statutory question to be considered further.
The ruling also comes after the Supreme Court considered an earlier stage of the same broader dispute in August. At that time, the justices allowed the Trump administration to proceed after finding that an earlier lower-court injunction had been issued before the Postal Service had completed its final rulemaking. The subsequent issuance of the final USPS rule led to the new round of litigation and the injunction now left in place.
For the 2026 midterm elections, the practical effect is immediate: election officials can continue preparing and distributing mail ballots under the procedures already established in their respective states, without the new USPS restrictions taking effect during the election cycle.
The broader legal dispute remains significant because it involves the balance between federal postal authority and the constitutional role of states and local governments in conducting elections. The Supreme Court’s September 14 order resolves the immediate emergency request but does not constitute a final merits judgment on every aspect of that conflict.
