A crowd-size expert from the U.K. estimates that between 10,000 to 15,000 people attended Saturday's protest in downtown Chicago. But some estimates say 75,000 people gathered downtown.

Photos from the “No Kings” protest in Chicago on Saturday as part of an anti-Donald Trump rally on the same day as his military parade in Washington, D.C., for his birthday.

The march became a Leftistpalooza for a variety of movements looking to attract new members (or at least sell a few newspapers).

Marissa Sulek speaks with protesters at the Chicago No Kings rally as they marched from Daley Plaza to Trump Tower and then on through the Loop.

The sounds of one of Chicago’s largest protests in recent memory reverberated throughout downtown Saturday, as tens of thousands gathered in a united admonishment of President Trump.

A huge and peaceful crowed turned out for the "No Kings" rally, shutting down much of the Loop as part of a nationwide protest movement to denounce the Trump administration.

The Chicago Teachers Union will be joining the "No Kings" march in downtown Chicago on Saturday, June 14, according to the union's website. The march is scheduled for the same day a massive military parade is set to take to the streets of Washington in an elaborate showcase of troops, tanks, weapons and aircraft.