Demonstrators crowded into streets, parks and plazas across the U.S. on Saturday to rally against President Donald Trump as officials urged calm and mobilized National Guard troops ahead of a military parade to mark the army's 250th anniversary,

The grand military parade that President Donald Trump had been wanting for years barreled down Constitution Avenue on Saturday with tanks, troops and a 21-gun salute, playing out against a counterpoint of protests around the country by those who decried the U.S. leader as a dictator and would-be king.