Many states count mail ballots that arrive after Election Day. Those grace periods could go away

There will be just one Election Day for this fall's midterm elections — Nov. 3. Whether that extra time should be allowed is at the heart of a case that will be argued Monday before the U.S. Supreme Court. If the court strikes down those grace periods, it will leave those states — and their voters — scrambling to adjust with only a few months before absentee ballots are sent out for this fall's midterm elections.