WHITFIELD: All right. Welcome back, I'm Fredricka Whitfield. Donald Trump has done it again, stirring up major controversy. This time going after John McCain over his record as a war hero. CNN's Mark Preston is live for us from Ames, Iowa. Mark, what happened and oh my gosh, the fallout already.</s>MARK PRESTON, CNN POLITICS EXECUTIVE DIRECTOR: No question, Fred. Listen, today was supposed to be a day of talking about policies, specifically social conservative policies and how these 10 Republicans who are addressing this very influential crowds here in Iowa, how they would act as president. However, Donald Trump, one of those presidential contenders, on stage had a direct attack on Senator John McCain. Let's see to what he had to say.
Trump Slams McCain's Status as War Hero