McCain Says Trump Owes All Veterans an Apology

John McCain has responded to Donald Trump's comments saying, "Again what I think he should do is apologize to the families and those who have served,"
1:41 | 07/20/15

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Transcript for McCain Says Trump Owes All Veterans an Apology
Now to the race for 2016 and growing outrage. Do some American veterans deserve an apology? Republican Donald Trump in that war of words after his comments about senator John McCain, the veteran and former prisoner of war. ABC's Jon Karl tonight with video of the moment and this evening, John McCain saying I don't need an apology. But other veterans do. Reporter: It all started when trump said this about John McCain. He's not a war hero. He's a war hero. He is a war hero. 5 1/2 years today McCain is calling on trump to apologize. Not to him but to all vets. What I think he should do is apologize to the families and those who have served. Reporter: Top republicans are hammering trump. It's offensive. It's ridiculous, and I do think it is a disqualifier as commander in chief. Reporter: But trump is not backing down. What could John McCain have done not to be captured? Well, I do this, 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. Reporter: The firestorm corporals as trump is riding high. Tonight's ABC news/"washington post" poll has Donald Trump with the biggest lead by far of any republican yet. The big question is what this controversy will do to trump's standing? Most of the poll was taken before trump's comments on John McCain. We'll watch it closely. Jon Karl at the white house, thanks.

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

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