Organizers of the Women's March form a human wall to help guide the hundreds of thousands of walking participants Saturday, January 20, 2018 in Chicago, Ill.

Demonstrators fill a closed-off Michigan Avenue during the Women's March Saturday, January 20, 2018 in Chicago, Ill. Organizers estimate nearly 300,000 people attended the event.

Members of Chicago Women in Trades lead the massive crowd in chants during the Women's March Saturday, January 20, 2018 in Chicago, Ill.

A woman wears a pink hat while walking the streets Saturday, January 20, 2018 in Chicago, Ill. The hats have become a symbol of women's rights and feminism in recent years.

A girl stands atop a cement post at Federal Plaza Saturday, January 20, 2018 in Chicago, Ill.

A group of demonstrators passed around a megaphone, leading their section of the march in different chants and songs Saturday, January 20, 2018 in Chicago, Ill.

A woman gives the finger to an anti-abortion protester who was displaying a graphic image during the Women's March Saturday, January 20, 2018 in Chicago, Ill.

A wall of demonstrators approach four Chicago Bucket Boys who set up in the middle of Jackson Boulevard prior to the beginning of the Women's March Saturday, January 20, 2018 in Chicago, Ill.

Chicago Police, Fire and Public Works departments all worked together to create a safe path for the march as demonstrators took to the streets Saturday, January 20, 2018 in Chicago, Ill.

Part of the Women's March passes under the L as people move towards Federal Plaza from Grant Park Saturday, January 20, 2018 in Chicago, Ill.

A Chicago police officer stands guard during a peaceful demonstration Saturday, January 20, 2018 in Chicago, Ill.

A participant stands on the sidewalk with an American flag during the Chicago Women's March Saturday, January 20, 2018 in Chicago, Ill.

Women in recognizable pink hats walk away from the demonstration as protest signs stick out of the trash Saturday, January 20, 2018 in Chicago, Ill.