Fourteen states plus Washington, D.C., and three U.S. territories accept absentee ballots that have been cast by Election Day but arrive later. Grace periods vary from state to state. Read more › Mail delays: The Postal Service has made changes that could affect election mail that could lead to delays in postmarking and delivery of mail.

In more than two hours of oral arguments Monday, the U.S. Supreme Court debated whether federal law allows states to count mail-in ballots received after Election Day.

Justices heard roughly two hours of oral arguments in the case, Watson v. Republican National Committee, centered on a 2024 lawsuit brought against Mississippi's state law that allows for the counting...