Entrances to a bulding at American University were plastered with posters created by Richard Spencer's "Operation Homeland."
Ohio State issued the denial more than a week after Richard pencer appeared at the University of Florida, which brought hundreds of protesters.
At least two of the men are linked to "extremist groups," police said.
One man arrested for illegally carrying a firearm on campus.
Richard Spencer's speech at the university in Gainesville comes about two months after rallies by neo-Nazis and white supremacists in Charlottesville, Virginia.
The University of Florida is slated to host Spencer, a proud endorser of white supremacy theories, for a speech on campus despite concerns by Jewish students.
Alt-right leader exchanges tweets with mayor who said his ilk are "not welcome."
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