...Trump swore that he would refuse his Presidential salary if elected... John F. Kennedy was the wealthiest man ever sworn in as President of the United States. He had given his congressional salary to charity, and he maintained the practice once he got to the White House. Herbert Hoover, whose net worth was estimated to be nearly $4 million in 1913, divided most of his presidential salary between various charities. He used the rest to supplement the incomes of his staff.