In PA, MN, and TX, federal judges have ordered election officials to "segregate" certain ballots.<br />The vote-by-mail ballots that arrive late are being set aside in case another court invalidates them.<br />Around 127,000 votes that were cast at drive-thru locations in TX during the early voting period.<br />Those ballots have been specially marked for the same reason, says Business Insider.<br />All of these court orders came after extensive litigation and it's not clear how many votes are at risk.
