Trump: I have respect for McCain, but I won't apologize

An apology from real estate mogul and Republican presidential contender Donald Trump to Sen. John McCain doesn't seem likely.Trump questioned McCain's military service during a speech over the weekend saying he wasn't a war hero.The backlash has been intense. McCain was a Navy pilot during the Vietnam War and was shot down.He was captured and held as a prisoner of war for years.Despite the comments, Trump is leading in the polls among the GOP.