Tampa police say they learned from the mistakes there and tried to be better prepared. At times, they seemed to easily outnumber the demonstrators.
Mayor Bob Buckhorn, a Democrat, said the protesters had been given additional space and access to toilets and water.
"We are being supportive of people who want to come and want to offer an alternative opinion," Buckhorn said.
But he said that police planned to respond quickly if groups broke off from protesters and were intent on damaging and destroying property. Castor said that's what happened when the protester was arrested Monday. He was part of a group that broke off from the main, peaceful march. The only other arrest came Sunday when a man carrying a machete in the event zone resisted officers, police said.
Associated Press writer Gary Fineout and photographer Chris O'Meara contributed to this story.
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