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US Republican presidential candidate Donald Trump (R) is greeted on stage by fellow Republican candidate Ted Cruz before speaking at a rally organized by the Tea Party Patriots against the Iran nuclear deal in front of the Capitol in Washington, DC, on September 9, 2015.
US Republican presidential candidate Donald Trump (R) is greeted on stage by fellow Republican candidate Ted Cruz before speaking at a rally organized by the Tea Party Patriots against the Iran nuclear deal in front of the Capitol in Washington, DC, on September 9, 2015.

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    Donald Trump backs off Ted Cruz, Cruz taunts Trump

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Donald Trump backs off Ted Cruz, Cruz taunts Trump

After coming in second in Iowa, Republican presidential candidate Donald Trump is toning down his attack against rival Ted Cruz while Cruz continues to go after Trump. CNN's Sunlen Serfaty reports.

Donald Trump backs off Ted Cruz, Cruz taunts Trump

After coming in second in Iowa, Republican presidential candidate Donald Trump is toning down his attack against rival Ted Cruz while Cruz continues to go after Trump. CNN's Sunlen Serfaty reports.