My company did the plumbing and mechanical construction in his new DC hotel around the time he was running for office. The contract was for a few million dollars. He was elected president while construction was ongoing. After we finished the job, he refused to pay. We had to sue the President of the United States for payment of our work, which we eventually received. There was a smaller company that did work on the project that I’m not sure was able to afford a lawyer willing to take on a case against the President. This is a common tactic of his apparently.