(CNN)The University of Florida in Gainesville is bracing for a day of protests Thursday when white supremacist Richard Spencer arrives on campus to deliver a speech on his racist views. The event, scheduled for Thursday afternoon, will be Spencer's first planned visit to a college campus since he and others participated in the "Unite the Right" rally in Charlottesville, Virginia, in August. University and local officials are concerned that Thursday's event could also become violent, and they have taken a number of steps to prevent that. On Monday, Florida Gov. Rick Scott declared a state of emergency for Alachua County,...