Trump, as expected, signed a flurry of executive orders on his first day back in office. Some, such as border- and immigration-related actions, are likely to directly affect Arizonans. Others, such as an effort to undo electric auto production, could have second-order relevance.

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.

During his campaign, President Trump proposed getting rid of taxes on overtime, tips and Social Security. What to know about those plans.