When Obama is impeached, who will become the next president?

Joe Biden... But Obama hasn't done anything against the U.S. constitution to get impeached. Republicans think that he is turning the country socialist and instituting communist ideas with his universal health care, and how he has communist and socialist politicians in his cabinet, but remember this: Ronald Reagan, a die hard republican, had communists and socialists in his cabinet, and he was against communism, with the Berlin Wall falling during his administration. Don't bash Obama for the hell of it, and actually look at his ideas and then have an opinion, because if you don't, nothing will get done.