No Kings” demonstrations marched in hundreds of cities on Saturday to protest what organizers describe as President Donald Trump’s authoritarian agenda, including recent immigration raids that have rattled communities across the country.

The parade, honoring the Army’s long-planned 250th anniversary celebration and coinciding with Trump’s 79th birthday, is set to step off from the Lincoln Memorial under the threat of stormy weather in Washington and protests around the country tied to a turbulent week of immigration enforcement that has involved military deployment in Los Angeles.