Rep Ted Lieu (D-Calif.) is introducing the Stop Waste and Misuse by the President Act.

…The Stop Waste and Misuse by the President (SWAMP) Act states that Trump’s visits to his own properties “results in the American taxpayer effectively subsidizing the president’s businesses.”

The bill would mandate that Trump and other high-ranking officials receiving Secret Service protection pay back costs stemming from visits to properties they own.

Dem unveils bill to make Trump refund travel costs | TheHill

Heh, SWAMP act.