Carson-Trump fist bump? High five? Awkward handshake?

— Katherine Faulders (@KFaulders) September 17, 2015

The moment came when Carson wanted to weigh in on the Iraq War. Trump showed his approval to Carson's answer; both oppose it.

\"I haven't had an opportunity to weigh in on foreign policy and I just want to mention that when the war -- when the issue occurred in 2003, I suggested to President Bush that he not go to war,\" Carson said.

During the debate, Carson even laughed off Trump's insult of his medical career -- saying Trump is an \"okay doctor\" after the business mogul answered a question about vaccines and autism.

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