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.

The "No Kings" protest, organized by Ohio 50501, drew hundreds of people to the Ohio Statehouse denouncing the Trump administration.

Demonstrators will march in Philly just days after Trump's controversial move to send troops to Los Angeles in response to protests against ICE.

As a military parade rolls through Washington, DC, on Saturday – President Donald Trump’s birthday – millions of Americans are expected to protest in what organizers predict will be the strongest display of opposition to Trump’s administration since he took office in January.

Walmart heiress Christy Walton's advertisement in The New York Times over the weekend has led some consumers to threaten a boycott of the retailer. The ad promoting a nationwide anti-Trump protest has prompted backlash against Walmart despite the company distancing itself from the full-page ad.

With No Kings protests planned Saturday in the Houston area, local organizers are calling for peaceful rallies, while officials like Mayor John Whitmire say they are working with organizers "to ensure that First Amendment rights are respected while maintaining public safety.

Organizers are calling for Americans to attend demonstrations across the country to protest President Trump on his 79th birthday.