Opponents of President Donald Trump’s administration are set to rally in Dallas, Fort Worth, Frisco, Arlington and other North Texas cities.

That’s part of why George Atkinson, a former high school government teacher, felt compelled to join a protest in downtown Houston on Saturday. The 89-year-old affixed a sign to his walker that read, “The clothes have no emperor! He’s all hat and no cattle!”

In New York City, the biggest "No Kings" demonstration began at Bryant Park on Saturday before moving down Fifth Avenue to Madison Square Park.

Organizers across the country named the mobilization “No Kings.” The rallies were organized in opposition to a military parade in Washington, D.C. on the president’s 79th birthday Saturday. The parade is happening on Flag Day, which also marks the U.S. Army’s 250th anniversary this year.

Civic Center Plaza in San Francisco and San Rafael were just two of the locations where protesters gathered for the "No Kings" rallies on June 14. Website: YouTube: Facebook: Instagram: Twitter:

Texas police say there are more than 10,000 people in attendance at the Capitol for Saturday's 'No Kings' protest. Follow for live updates.

Protesters rallied in parks and plazas across the United States on the same day that President Donald Trump held a massive military parade.

Organizers said demonstrations were arranged to reject authoritarianism, billionaire-first politics and the militarization of the country’s democracy.