I cited two things to vote for:

(1) Obama, while unwilling to pursue a serious policy to ameliorate climate change, is willing to, and has, pursued portions of a sustainable energy policy that lays the foundation for a serious policy to ameliorate climate change; and

(2) Obama is term limited, so voting for Obama is a vote for an open election in 2016.

I've been accused of being a Marxist, yet while Harpo's my favourite, it's Groucho I'm always quoting. Odd, that.