WASHINGTON (AP) — The 250th anniversary of American independence is colliding with a country gripped by political polarization and a heat wave bearing down on millions of people across multiple states as celebrations get underway across the United States on Saturday.

The signing of the Declaration of Independence, one of history's most celebrated articulations of democratic ambitions, is being marked in myriad ways. President , set to take a central role in festivities, plans to speak on the ɫtv Mall in Washington ahead of what's being billed as a historically enormous fireworks show that will rain down over the nation's capital. The president was in South Dakota at Mount Rushmore on Friday, where he delivered a about the threat of communism in the U.S. as the chiseled images of four of his most prominent predecessors loomed behind him.

The Associated Press