Donald Trump refuses to apologize for comments about Senator John McCain's war record, in remarks that could mark the beginning of the end of Trump's presidential bid. Gavino Garay reports.
U.S. presidential candidate Donald Trump is causing controversy -- again. This time, over his remarks about Vietnam war veteran and U.S. Senator John McCain. (SOUNDBITE) (English) PRESIDENTIAL CANDIDATE DONALD TRUMP SAYING: "He's not a war hero. He's a war hero because he was captured. I like people that weren't captured." Arizona Senator McCain was a Navy fighter pilot. He was imprisoned and tortured for five years during the Vietnam war after being shot down. Billionaire businessman Trump says he's unapologetic over his remarks, despite a barrage of condemnation from fellow Republicans. (SOUNDBITE) (English) PRESIDENTIAL CANDIDATE DONALD TRUMP SAYING: "John McCain has not done enough for the veterans. The veterans in this country are suffering. The veterans in this country are treated as third-class citizens. John McCain talks a lot, but he doesn't do anything." On the campaign trial in Iowa, Republican presidential hopeful Scott Walker said trump was -- quote -- "attacking an American hero." (SOUNDBITE) (English) REPUBLICAN PRESIDENTIAL CANDIDATE SCOTT WALKER SAYING: "He needs to apologize to Senator McCain and all the other men and women who have worn the uniform, that is just a disgrace." Trump, who was widely criticized over recent comments about Mexican immigrants, is leading in polls in several states. He's rejected calls from fellow Republicans to drop out of the race... but some Republican commentators are saying his latest remarks could be the beginning of the end of his presidential bid.