RNC chairman says Romney's birtherism is levity in politics. If it were levity it would be self-deprecating. For example Romney making jokes about how his underwear is itching in the heat. Or joking about what his other wives are going to say when he gets home. Forget about his birth certificate, let's see the marriage certificates. All of them.
Romney, if you want to show you have a sense of humor, show a clip from Big Love at one of the campaign rallies.
That would be some levity.