Tens of thousands of Americans joined "No Kings" protests across the United States against the Trump administration.

Northern Colorado saw some of the state’s biggest protests Saturday, but even smaller communities drew crowds.

The Belleville and O’Fallon demonstrations were among more than 1,500 across the country against a litany of what protesters argue are authoritarian actions by Trump. They scheduled the “No Kings” protests to happen at the same time as a large military parade in Washington marking the Army’s 250th anniversary.

Massachusetts prepares for No Kings protests on Trump's birthday as tensions explode over federal agents handcuffing Senator Padilla in California.

According to San Diego police, an estimated 60,000 protesters showed up downtown for the morning events, marching along Harbor Drive and Pacific Highway. Organizers placed the figure higher, at 80,000.

I GOT TO SHOW UP LIKE IT’S BECOMING MORE AND MORE IMPORTANT. SO PEOPLE GOT TO SHOW UP AND SHOW UP. THEY DID. ALSO IN BOSTON, DEMONSTRATORS FOR THE NO. KING’S PROTEST, A RALLY AT CITIES ACROSS THE COUNTRY INCLUDING BOSTON.

Protests across U.S. planned for same day as the Army 250th anniversary parade, and Trump's birthday, in Washington, D.C.

Tight security ensured a family-oriented atmosphere at the U.S. Army's 250th anniversary parade despite liberal opposition and protests nearby.