The bottom line: Unlike most presidents, Trump refuses to share his federal tax returns, and thus, no one can see where his income come from, how much it is, and where it is invested. Further, he has not recused himself or his children from their vast Trump empire holdings. And he has spent tens of millions of taxpayer dollars at Trump Resort properties. The Secret Service has had the most difficult time managing this sensitive “emoluments” issue, as they must both protect the president and house their agents at his resort, or wherever the president stays.