Defiant Trump refuses to apologize to McCain

Donald Trump wouldn't apologize Sunday after igniting a political firestorm a day earlier by questioning whether Sen. John McCain -- who spent five years as a prisoner during the Vietnam War -- is a war hero.

Asked by ABC News whether he owes McCain an apology, Trump said: "No, not at all."

"People that fought hard and weren't captured and went through a lot, they get no credit. Nobody even talks about them. They're like forgotten. And I think that's a shame, if you want to know the truth," Trump said Sunday.