The Nevada Supreme Court on Monday ruled that mail-in ballots received after Election Day without a postmark may be counted, a loss for Republicans in a battleground state that could determine the next president and control of the U.

Courts are responding to lawsuits across the country on how ballots and voter rolls are handled in the weeks before Election Day.

The Republican National Committee has fought to count mailed ballots only if dated correctly and if they arrive by Election Day.

A U.S. appeals court on Friday said it was illegal for states to count mail-in ballots received after Election Day, siding with Republicans in a case challenging Mississippi's five-day grace period.

Close races could change after Election Day, although the Secretary of State's Office says the goal is to get results known Nov. 5.

A federal appeals court ruled on Friday that a Mississippi law allowing mail-in ballots with appropriate postmarks to arrive after Election Day is invalid. Why it matters: The U.S. Court of Appeals for the 5th Circuit ruled that state law "is preempted by federal law,

The judges issued an order saying the ruling would not officially be returned to a lower court until seven days after the deadline for appealing their decision has passed — which is usually at

The Nevada Supreme Court upheld a lower court’s ruling Monday, allowing mail-in ballots without postmarks received by Election Day to be counted in the days after the election.

The Nevada Supreme Court says Republicans did not provide sufficient evidence that late mail-in ballots without a postmark were vulnerable to fraud.