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

Election officials must maintain the chain of custody for ballots, voting machines, and other equipment to ensure the integrity of the election.

In some states, such as Florida, all ballots are counted on Election Day and results are guaranteed to be certified by the end of the night. In other states, such as California, there is hardly such a ...