Comedians, outside of Franken, almost universally make the best politicans, debators, and interviewers. It's because in the realm of politics, that sense of humor is vital and necessary. Have you ever seen the hardcore, humorless politicians? They're boring, insipid, and often make the most dry and inane points - and this is regardless of which letter is at the end of their name. People who are too much into politics outside of a plethora of outside interests are incredibly sociopathic and maladjusted.
It's not too far away from my theory of why lawyers make the worst politicians.