Like his father, he uses Twitter to thrash liberals and lend support to those who are friendly to the president’s populist agenda. Given that he is a skilled outdoorsman and a member of the National Rifle Association who owns dozens of firearms, among them a Benelli Super Black Eagle II (for hunting waterfowl) and an AR-platform semiautomatic rifle (for marksmanship competitions), Mr. Trump also connects with heartland voters in a way that his more refined sister Ivanka may not.
While Ms. Trump and her husband, Jared Kushner, have lately elevated their social profile in Washington and Palm Beach, Fla., while keeping close contact with the president, her oldest brother has largely avoided the balls and benefits, preferring to hunker down in Midtown during the workweek and spend weekends in the Catskills with his wife, Vanessa, and their five children.
“Don is the more chill version of any of the kids,” said Dee Dee Sides, who has known him since the early 2000s.
He came into his own as a public figure during the presidential campaign. On the stump he was equally at ease before crowds in both Mississippi and Michigan, and television pundits gushed about his political future after his bluntly effective speech at the Republican National Convention, with some mentioning him as a potential mayoral candidate in New York City.
“I don’t know if I could go all-in at that,” Mr. Trump said of a political career. “There is a part that is incredibly enticing. But it’s not human most of the time.”
Even as he embraces his new status in business and politics, Mr. Trump sounds, at times, as if it is some kind of anomaly.
“If I could miracle myself away,” he…