A fight over who controls the mechanics of mail voting is accelerating just weeks before the midterm elections, with 24 states and Washington, D.C., asking a federal court to halt new Postal Service requirements before they reach voters.

The states, led by Democratic officials, argue that the rule exceeds executive authority and intrudes on their constitutional power to administer elections. They warn that redesigning ballot envelopes, building data systems, training election workers and educating voters on a compressed schedule could disrupt preparations and disenfranchise eligible voters. In their complaint, the attorneys general wrote that “The Rule violates the Constitution and federal statutes many times over.”¹

The administration presents the same requirements as a safeguard rather than an intrusion. The rule calls for trackable barcodes on ballot envelopes and directs state officials to submit the names and addresses of intended mail-ballot recipients to an online portal. USPS says the resulting state-specific lists could help officials and law enforcement identify suspicious or anomalous activity, while insisting it will not determine voter eligibility, maintain voter rolls or count ballots.

The White House framed the opposition as resistance to election security, saying that “Radical Democrats continue to oppose commonsense measures that protect the security of mail-in ballots.”² That argument contrasts sharply with the states’ claim that the policy is an unlawful federal takeover. California Attorney General Rob Bonta said the Constitution gives states the power to regulate elections, “not the President and not USPS.”²

The Supreme Court recently lifted an earlier injunction on procedural grounds, stressing that its decision did not establish that the eventual policy would be lawful. A new lawsuit now tests the rule on its merits, but timing may matter as much as legal doctrine: some states will begin sending mail ballots in early September. The result is a collision between competing definitions of election integrity—uniform federal visibility on one side, and state control and operational stability on the other.