Thousands gathered for the No Kings protest at the Michigan State Capitol building in Lansing on Saturday, June 14.

PHILADELPHIA (AP) — Cities large and small were preparing for major demonstrations Saturday across the U.S. against President Donald Trump, as officials urge calm, National Guard troops mobilize and Trump attends a military parade in Washington to mark the Army’s 250th anniversary.

While President Donald Trump attended a military parade he ordered on his birthday to recognize the 250th anniversary of the U.S. Army in Washington, D.C., thousands of people in the Kansas City metro area flexed their First Amendment right Saturday to voice their opposition to polices of the Trump administration during the "No Kings" national day of defiance.

Millions marched in cities and towns across the U.S. in "No Kings" protests to rally against the Trump administration.

Hundreds of demonstrators chanted 'hey hey, ho ho, Donald Trump has got to go" outside the Mississippi Capitol Saturday as part of nationwide 'No Kings' protests against President Donald Trump.

"No Kings" protests against the Trump administration are taking place today in and around New York City as part of nationwide demonstrations. Fifth Avenue was closed to traffic from 42nd Street to 23rd Street in Manhattan as protesters marched from Bryant Park.

CNN spoke to several protesters among the millions of Americans who are expected to attend “No Kings” protests across the country on Saturday to denounce what organizers describe as President Donald Trump’s authoritarian policies and “militarization of our democracy.