Donald Trump. Come on, people! You have to know he is in this for the self-promotion. There never was a greater huckster since P.T. Barnum himself! I mean no disrespect, but it does tend to link the Birthers and the targets of Barnum's hucksterism. The donald sure knows his audience, though. What is it? Over 50% of Republicans who are Birthers or have doubts? ("If only Obama would just prove he wasn't born in Kenya, Indonesia and every other square foot of the planet, then we might believe he was actually born in Hawaii!")
The donald isn't the only one, either. It always is an odd collection of characters when a party's nomination for president is wide open. But never (that I can think of) has there been such a menagerie of craziness. And not just the donald is using the presidential field for self-boosterism.