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Republican presidential hopefuls Ben Carson (L) and Donald Trump look on during the Republican Presidential Debate at the Ronald Reagan Presidential Library in Simi Valley, California, September 16, 2015. Republican presidential candidates collectively turned their sights on frontrunner Donald Trump at the party's second debate, taking aim at his lack of political experience and his sometimes abrasive style. AFP PHOTO / FREDERIC J BROWN        (Photo credit should read FREDERIC J BROWN/AFP/Getty Images)
Republican presidential hopefuls Ben Carson (L) and Donald Trump look on during the Republican Presidential Debate at the Ronald Reagan Presidential Library in Simi Valley, California, September 16, 2015. Republican presidential candidates collectively turned their sights on frontrunner Donald Trump at the party's second debate, taking aim at his lack of political experience and his sometimes abrasive style. AFP PHOTO / FREDERIC J BROWN        (Photo credit should read FREDERIC J BROWN/AFP/Getty Images)

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    Trump compares Carson's 'pathological' temper to child molesters

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Trump compares Carson's 'pathological' temper to child molesters

Donald Trump tells CNN's Erin Burnett he is concerned by Dr. Ben Carson's self-described "pathological" temper.

Trump compares Carson's 'pathological' temper to child molesters

Donald Trump tells CNN's Erin Burnett he is concerned by Dr. Ben Carson's self-described "pathological" temper.