Black Democrats won big in the Mississippi Legislature for the state's special election, flipping multiple seats to end the GOP supermajority.

The Supreme Court will decide whether federal law prohibits states from counting mail-in ballots that arrive after Election Day.

The U.S. Supreme Court will review a case challenging Mississippi's law that allows mail-in ballots to be counted up to five days after Election Day. The Republican National Committee argues that only Congress, not states, can set rules for federal elections, such as ballot deadlines.

Sixteen states, including Oregon, accept mail-in ballots that are postmarked by Election Day but arrive after. The Supreme Court will consider the legality of that practice.