Trump Backers See Trade Deal With South Korea as a Validation

The assembly line at the General Motors plant in Lansing, Mich., March 5, 2018. President Trump, who bragged repeatedly on the campaign trail about his prowess as a negotiator, scored his first significant deal-making win this week, securing a bilateral trade deal with South Korea and winning the type of one-on-one agreement he has promised will benefit American companies and workers. (Brittany Greeson/The New York Times)