There is a no-cross line of 100 ft. around a polling place. Only a voter going to vote can cross that line going to the polling place. No one else can. An election judge has the power of a district judge on election day. If there is trouble in the polling place, that judge can call law enforcement and allow them to cross the 100 ft. line and come into the polling place. Trump's "law enforcement" cannot cross that line unless asked to cross it by the election judge. The election judge, if he/she needs to call due to a problem, is going to call local law enforcement, not Trump's men, whatever he calls them.