The "No Kings" protest is taking place in cities across the country in response to Trump's military parade in Washington, D.C.

Thousands of 'No Kings Day' protests are expected to take place across the nation Saturday, with the 'flagship' protest planned for Philadelphia.

In a city known as the cradle of American democracy, an impassioned, hourslong protest filled the streets for a ‘No Kings Nationwide Day of Defiance.’

Philadelphia’s "No Kings" protest was a mass expression of anti-Trump resistance. It was also a magnet for lovers of period costumes. The rally featured a professional James Madison impersonator, a suffragette and an array of folks in wigs and tricorn hats.

Mayor Cherelle L. Parker warned that at Saturday’s planned protest in Philadelphia against President Donald Trump’s policies, the “order of the day” for city police will be “keeping the peace.” “Philadelphia is ready for this weekend,

Protests against the Trump administration are set to take place in and around New York City Saturday as part of a nationwide "No Kings" demonstration. CBS News New York's Ali Bauman reports.

Philadelphia Police are stationed along the edges of today’s protest but seem pretty relaxed. Most are outfitted in normal attire — no riot shields or helmets. "So far, so good," one officer replied when asked if there had been any disruptions.

Immigration and Customs Enforcement is also planning to send teams to other Democrat-run cities ahead of the upcoming "No Kings" protests.