Donald Trump Gets Booed

Trump blasted Republican rival Marco Rubio, calling him a 'clown.'
1:44 | 09/26/15

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Transcript for Donald Trump Gets Booed
some of the tickets ending up on craigs list. Scalped for 00$1 each. T's ie ofon the fir to St be clusineiv of everody.yb Block after block after block. There are soany M yoppeanoule C Ba ly revemoown D the Se ritycut aer F evpitch. Teams ofofficers, banks of metal detectors. An D the park. For this woman You go to the stores and it says "Happy holiday." Reporter: But trump then apparently committing a political sin. I mean you have this clown, Marco Rubio. I've been so nice to him. I've been so nice. Reporter: Rubio, rising in the polls, and taking on trump. But he can't have a conversation about policy because, quite frankly, he doesn't know anything about policy. Reporter: But trump does know how to fight. Now he's all over Rubio. Trump's fire once squarely trained on Jeb bush. But now, bush facing criticism over something he said about how to attract african-american voters. Our message is one of hope and aspiration. It isn't one of division and get in line, and we'll take care of you with free stuff. Reporter: Singer John legend tweeting, "It's always the guys born on third base talking about black people lining up for free stuff." David, tonight I spoke with senior members of the bush campaign, saying his comments were taken out of context. Tom, thanks. Now to a new and troubling video. A deadly encounter with police,

This transcript has been automatically generated and may not be 100% accurate.

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