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.

Loren Malone, co-founder of Indivisible Tri-Cities, the local organizer, estimates nearly 5,000 peaceful demonstrators from around the region showed up to the “No Kings Day” protest. Kennewick was one of 2,000 cities across the nation that held protests expected to draw millions this weekend.

Thousands gathered in downtown Rock Hill on Saturday for a “No Kings” rally and march, joining national demonstrations coinciding with Flag Day and a military parade in Washington, D.C., by President Donald Trump to honor the U.S. Army’s 250th anniversary.

A day of nationwide defiance." It called today's celebration in Washington D.C., a "spectacle meant to look like strength." The protest in Savannah was hosted by Coastal Georgia for Democracy and the Savannah Chapter of the Democratic Socialists of America.

Columbus' massive Pride celebration takes place June 14. Meanwhile, No Kings rallies are planned across central Ohio, the Buckeye State and nation.

Thousands marched from City Island to Riverfront Park as part of the national “No Kings” protest movement calling for democratic reform.

The rallies coincide with a Washington, D.C., parade celebrating the 250th anniversary of the U.S. Army and President Donald Trump's 79th birthday.