David Letterman fired the first shot in this battle when he took Trump to task via "Late Show" guest Dr. Phil McGraw about his questioning President Barack Obama's entry into Harvard. Letterman told McGraw in late April, "It's all fun, it's all a circus, it's all a rodeo, until it starts to smack of racism. And then it's no longer fun." Trump promptly canceled his May 18 appearance on "The Late Show" and reportedly wrote Letterman a personal note that said he was "disappointed to hear the statements you made about me last night on your show that I was a 'racist.' ... In actuality, nothing could be further from the truth and there is nobody who is less of a racist than Donald Trump."
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