ABCNews -- Political A-listers are hitting the campaign trail today to fire up crowds as Democratic and Republican candidates run neck and neck in three hotly contested elections. And at the front of a full-scale sparring match leading up to today's voting: Vice President Joe Biden and his former opponent, Sarah Palin. The former Alaska governor is supporting conservative candidate Douglas Hoffman, running for the congressional seat representing New York's conservative, upstate 23rd District. The endorsement somehow made Biden think of oil. "The fact of the matter is that Sarah Palin thinks the answer to energy was drill baby drill," Biden said Monday at a fundraiser here for Hoffman's Democratic opponent, Bill Owens, referring to Palin's own...