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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: Ted Cruz 'is a nasty guy'

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Donald Trump: Ted Cruz 'is a nasty guy'

Republican presidential Donald Trump talks to CNN's Wolf Blitzer about his rivalry with Sen. Ted Cruz.

Donald Trump: Ted Cruz 'is a nasty guy'

Republican presidential Donald Trump talks to CNN's Wolf Blitzer about his rivalry with Sen. Ted Cruz.