Howard Lutnick Emerges as Trump’s No. 1 Salesman on Wall Street

Howard Lutnick settled into a cream-colored leather seat as Trump Force One, the former president’s private jet, climbed over Nashville and banked northward. It was late July, and the Wall Street billionaire was on a mission for his friend Donald Trump.

The two were in Tennessee that Saturday to promote high-risk investments they hoped would pay off for both of them—cryptocurrencies. Then the Boeing 757 took them to Minnesota for Trump’s favorite activity: addressing cheering crowds at rallies.

After landing, the two were ferried to a hockey arena in St. Cloud, 65 miles northwest of Minneapolis, where Lutnick bounded ...