CHICAGO (AP) -- Organizers say they expect tens of thousands of demonstrators to turn out for today's immigration rights protest in Chicago.
Rally organizer Jorge Mujica says he's confident at least 100-thousand protesters will participate this afternoon.
He and other organizers began gathering this morning at Union Park, where demonstrators began arriving -- many carrying American flags.
Mujica says the main message they want to convey is that Washington needs to get serious about immigration reform. Another rallying cry will be for federal authorities to stop raids and deportations.
Mujica adds that preparations for today's rally are going smoothly. He says that includes good cooperation with police and city authorities.