White supremacist David Duke was taking part at a debate in the historically black Dillard University.
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Students have clashed with police at Dillard University in Louisiana at a protest against former KKK leader.
David Duke was on campus to take part in a debate with other candidates running for the US Senate.
His inclusion in the debate angered students at the historically black college.
After hours of peaceful demos, a group tried to enter the debate hall and police used pepper spray on the protesters.
“I was covered on my shirt, my arms, my face — they are pepper-spraying. They are body slamming people,” said one of the student demonstrators.
Duke is backing Republican presidential candidate Donald Trump.
When Trump won the party’s nomination in July, Duke stated his intention to run for the Senate saying “the climate of this country has moved in my direction.”