What are their types.
Here are my rough guesses (without much thought):
Joe Biden: INTp (Note: Concise, strong statements seem to be more indicative of crea-T and Gamma than being a "rational" type)
Hillary Clinton: ESTp
Bill Richardson: ESTj (seemed very S, administrative)
Christopher Dodd ST...?
Denis Kucinich: INj...probably INTj
Barak O'Bama: ENFj
Forgot the other guy's name all the way on the left....He said some interesting things though.