https://abc7chicago.com/post/us-secret-service-cpd-provide-update-chicago-democratic/14909816/
"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.
The police would suddenly be experts about vagrancy laws. I seriously wonder how many minutes a protestor could peacefully be in a hotel lobby until the cops decided it's time for them to get arrested.