I want him to win so that he leaves the White House in 2016 a broken shell of a man, responsible for the utter discrediting of his shallow ideals and of his party that is now a European socialist party.
The Republicans have no one good, and if their candidate is elected on a spite Obama platform, his successor will be another Obama or worse. Letting Obama win again (which is what happened in 2008 – McCain was a hopeless case) allows the Republicans to find another Reagan while the Democrats end up as disdained as Harding or Grant.