Many of the approximately 300 lawsuits filed this year over voting rules have been settled. But some key ones remain unresolved and court decisions could still reshape how voting is conducted in some crucial battleground states.
The flurry of last-minute legal action comes as more than 5 million people have already cast ballots early or by mail, causing some confusion over what voters have to do to ensure that their votes count.
On Monday, the U.S. Supreme Court ordered that voters in South Carolina need a witness signature on their absentee ballots. But the high court said the order did not apply to tens of thousands of voters in the state who have already voted, because a lower court ruled last month that the witness signature was not required.
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