According to a report from The Hill, Trump's social media director, Dan Scavino, sent a tweet reading "We hear you Pennsylvania! Nobody likes to be duped! You can change your early VOTE by calling 1-877-868-3772. Join the MOVEMENT. LETS #MAGA!"
— Kyle Foley 🦍 (@KFoleyFL) November 1, 2016
Pennsylvania does not offer in-person early voting, but does offer mail-in absentee ballots. These ballots can only be obtained if the voter is unable to make it to his or her polling place on Election Day because of travel for work, or because of an illness or disability.
If a voter already submitted an absentee ballot and then finds her or she is able to vote in person on November 8th after all, he or she must appear and vote in person, notifying the poll worker of the absentee ballot. The absentee ballot would then be thrown out. Despite the phrasing of Scavino's original tweet, which listed the phone number for the state's Bureau of Commissions, Elections, and Legislation, Pennsylvania voters cannot change their vote by phone.
Scavino later rephrased the tweet to include more states and mention absentee voting:
Looking to change early VOTE/ABSENTEE in Pennsylvania, Michigan, Minnesota, or Wisconsin!?Feeling duped? Despite reports you cant, you can!👇 pic.twitter.com/GSXc6a3GVt
— Dan Scavino Jr. (@DanScavino) November 1, 2016
Whether or not a voter can "change" his or her early or absentee vote varies by state.