Republican officials and candidates in at least three battleground states are pushing to disqualify thousands of mail ballots after urging their own supporters to vote on Election Day, in what critics are calling a concerted attempt at partisan voter suppression.
Election officials are on alert for voter intimidation. Problems with voting machines in Arizona have been seized on by the right. Our reporters are covering the issues from polling places around the country.
The effort is one of several misinformation rapid response teams run by state and local officials to confront problematic online assertions that fuel voter distrust.