In the 6 p.m. hour, Mr. Trump signed more orders before a packed Capital One Arena, in Washington, D.C. Among them, a requirement that federal workers return to full-time work in person immediately, a freeze on all federal hiring, except by the military and some other excluded categories.

President Trump, starting his second term, began a slew of executive actions by rescinding 78 Biden-era executive orders, executive actions, and presidential memoranda.