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Republican presidential candidate Donald Trump arrives on stage as he concedes defeat in the Iowa Caucus during his President Caucus Watch Party at the Sheraton Hotel on February 1, 2016 in Des Moines, Iowa.
Republican presidential candidate Donald Trump arrives on stage as he concedes defeat in the Iowa Caucus during his President Caucus Watch Party at the Sheraton Hotel on February 1, 2016 in Des Moines, Iowa.

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    Two sides of Donald Trump

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Two sides of Donald Trump

Once outrageous and insulting, presidential candidate Donald Trump suddenly becomes conciliatory. CNN's Kyung Lah reports.

Two sides of Donald Trump

Once outrageous and insulting, presidential candidate Donald Trump suddenly becomes conciliatory. CNN's Kyung Lah reports.