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

RIPPLE EFFECT: Thousands of demonstrators marched through downtown Chicago on Tuesday, stopping traffic in the Loop and along DuSable Lake Shore Drive to protest the Trump administration’s immigration raids that have erupted in California and across the country.

The woman was taken to Northwestern Memorial Hospital where she was treated and released, Chicago police said.