Chicago police won't say how many protesters they are expecting for the Democratic National Convention in August, but a coalition of groups planning to march on the convention said there will be as many as 40,000.
"Even if it's not an act of violence, and it appears peaceful, but it's a violation of the law, blocking roadways, blocking venues, things of that nature, we will declare mass arrests in those situations and make those arrests," Chicago Police Superintendent Larry Snelling said.