A man arrested for impersonating a police officer during an anti-ICE protest in Chicago had a loaded semi-automatic weapon, badges and fake documents, police sources said.

The arrest of the four came two days after ICE detained 76 workers at the Glenn Valley Foods meatpacking plant near 68th and J Streets.

At 4 p.m. as protesters were gathering, a counterprotester came to the scene — prompting angry chants to erupt from the main protest.

Protests against raids by Immigration and Customs Enforcement (ICE) popped up in major cities across the country this week as organizing groups gear up for a nationwide day of action on Saturday again...