Democrats might lose the Senate [today]. If they don’t, they might lose it in 2014. Or 2016, when President Romney is reelected atop a booming economy, and right before the unexpected retirement of one of the liberal members of the Supreme Court. What happens then? Are the endorsements void? It’s a strange kind of endorsement that only works as long as the presidential candidate being endorsed isn’t able to govern alongside members of his own party. More to the point, it’s a self-nullifying kind of endorsement.