Vote for the greatest non-human president of the United States

With every passing election year, the statistical likelihood increases that we'll elect a U.S. president who's really a robot, or an alien. Or maybe a charismatic plant, grown in some kind of tank. How will you recognize a non-human candidate for president when one comes along? And more importantly, which non-human… » 2/22/12 8:00am 2/22/12 8:00am