donald trump is urging early voters who have what he calls buyers remorse to switch their votes to him. cnn's tom foreman explains. >> let's bring in the map because by our count, you can get a do-over. you can change your vote in at least seven different states, wisconsin, michigan, pennsylvania, new york, connecticut, down here in mississippi, also up in minnesota although they're deadlined past earlier this week and usually it's a system process. you have to show up in person. you have to nullify the vote that you've already cast, that essentially means you tell an election official i don't want that counted when election day comes around, let me cast a new one, and then you do have to cast another ballot often actually on election day. you can't always do that earlier. but, each state has its own quirks, its own rules and they're not always easy for normal voter to find. maybe that's why this doesn't happen very often. for example, if you look at the