WASHINGTON—President Donald Trump wrapped up the greatest political comeback in modern American history on Jan. 20 by taking the oath of office at the Capitol in front of some of his most prominent supporters and opponents. In the inaugural address, the president envisioned a bold agenda and announced a spree of executive actions to set it in motion the same day. He declared national emergencies regarding energy and the southern border, designated Mexican drug cartels as global terrorist groups, and declared that it is the policy of the United States that there are two genders. The president recalled the unprecedented challenges he overcame during the campaign, including prosecutions by state and federal authorities, the raid of his home in Mar-a-Lago in Florida, and two attempts on his life….