Well, it isn't contraception despite numerous questions from the media during the debate the other night. It's the issues the media won't talk about in the GOP debates - jobs and the economy. From Gallup (larger version here):
Obama plans to base his campaign on a rich vs. America scheme, but according to this poll, only 2% of Americans are concerned about the divide between the rich and the poor. Apparently the Occupy message has been completely lost on average Americans, and that's good.