Two parts in the debate I noticed: the first one was that super-heated sparring match between Obama and Clinton. Obama started it by bringing up Clinton's record, then Clinton responded about Obama saying 2 different things and there was a shouting match between them. The last thing she said was that he (Obama) was taking orders from a slum lord in Chicago, and if you listened carefully there was a series of boos in the audience.
Then at the end they were all asked if MLK were alive today, why would he support any of them. Edwards said why he would, Obama said he wouldn't support any of them, Clinton didn't directly answer the question.