Our current president seems to have had a bit of a problem casting his ballot in 2004. Ever the publicity hound, he allowed Access Hollywood to follow him around on election day. Was he not registered? Did he not know what precinct he was supposed to go to? He ended up with what he called an absentee ballot, but you couldn't get one on election day. It had to be a provisional ballot, which was only valid if they ever found his registration.