Phoenix's "No Kings Day" rally against President Trump, one of many nationwide, coincided with his 79th birthday and military parade in Washington, D.C.

At least one demonstration, about 70 miles from Washington, D.C., in Northern Virginia, was met with violence when a man intentionally drove an SUV through a crowd of departing protesters, striking at least one person,

A flagship "No Kings" march and rally are planned in Philadelphia, but no events are scheduled to take place in Washington, D.C., where the military parade will take place on Trump's 79th birthday. Organizers of the protests say they want to take attention away from the parade.

The Houston demonstration is one of several planned in the region throughout the day and is expected to draw thousands of protesters.

Anti-Trump protests are planned for Harrisburg, Lancaster, York, Gettysburg and thousands of other places throughout central Pennsylvania and the nation.

Law enforcement is on high alert for Saturday's "No Kings Day" planned protests in response to Trump's controversial military parade in Washington D.C.