The president is not allowed to accept gifts from foreign governments without permission from Congress. Government leaders and entities frequent his hotels, clubs and restaurants, Trump is in breach of the Emoluments Clause. The fear is that international officials will try to curry favor with Trump by patronizing his properties. One would hope that President Trump would take the necessary steps to avoid violating the Constitution before he took office. He did not. His constitutional violations are immediate and serious, so legal action is being taken.