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.

PHILADELPHIA -- 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.

More than 1,800 "No Kings" demonstrations are scheduled across the country. Here's what health and civil rights experts say you should keep in mind.

We implore everyone not to play into Trump’s hands and fall for his schemes,” the chair of the Washington State Democratic Party said in a statement.

Thousands of "No Kings Day" protests are set to be held throughout the country on Saturday to protest the Trump administration.

The No Kings Day of Defiance protests will happen during the military parade in Washington on Saturday for the Army’s 250th anniversary — which coincides with Trump’s birthday.

"No Kings" protests have been organized nationwide in response to a massive military parade in Washington, D.C.