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RICHMOND, VA - OCTOBER 14: Demonstrators interrupt a rally with Republican presidential candidate and front-runner Donald Trump at the Richmond International Raceway October 14, 2015 in Richmond, Virginia. A New York real estate mogul and reality television star, Trump is now in a statistical tie with retired neurosurgeon Ben Carson in a Fox News survey of likely Republican voters released Tuesday. (Photo by Chip Somodevilla/Getty Images)
RICHMOND, VA - OCTOBER 14: Demonstrators interrupt a rally with Republican presidential candidate and front-runner Donald Trump at the Richmond International Raceway October 14, 2015 in Richmond, Virginia. A New York real estate mogul and reality television star, Trump is now in a statistical tie with retired neurosurgeon Ben Carson in a Fox News survey of likely Republican voters released Tuesday. (Photo by Chip Somodevilla/Getty Images)

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    Donald Trump supporter spits on protester

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Donald Trump supporter spits on protester

A rally for Republican presidential candidate Donald Trump had several heated moments when protesters clashed with supporters. CNN's Athena Jones reports.

Donald Trump supporter spits on protester

A rally for Republican presidential candidate Donald Trump had several heated moments when protesters clashed with supporters. CNN's Athena Jones reports.