Conservatives want mail-in ballots to be counted no later than Election Day. Illinois allows ballots postmarked or certified by Election Day to be counted up to 14 days after the election.

The Supreme Court agreed Monday to decide whether states may collect mail-in ballots after Election Day, taking up a Republican-led lawsuit that could affect election laws in more than a dozen states ...

The justices agreed to hear a challenge to Mississippi’s law, a case that could upend similar measures in dozens of states before the 2026 election.