WASHINGTON—President-elect Donald Trump spoke at a rally on Sunday, the eve of Inauguration Day, at the Capitol One Arena in downtown Washington. At the “Make America Great Again” victory rally, Trump offered a preview of the actions he would take upon being sworn in on Jan. 20 as the 47th president of the United States. “We won,” Trump said, before beginning his speech. “Tomorrow at noon, the curtain closes on four long years of American decline, and we begin a brand new day of American strength and prosperity, dignity, and pride,” he told his supporters. “This is the greatest political movement in American history.”…