Let’s look at actual facts.
Fact One: The Emoluments Clause, which reads, “No title of nobility shall be granted by the United States: and no person holding any office of profit or trust under them, shall, without the consent of the Congress, accept of any present, emolument, office, or title, of any kind whatever, from any king, prince, or foreign state.”
Fact Two: Since Trump was inaugurated, he has profited off foreign diplomats and dignitaries staying at properties he owns and holding events at them. Often with encouragement from Trump or his team. And it has been well-known that if you want to curry favor with this President, you patronize his properties. At first, Trump sought to get around the Emoluments Clause by donating all profits from foreign government personnel to the US Treasury. That not only hasn’t been done, but Trump’s people now say it isn’t going to happen (which is a giant middle finger to America).
In early January, Donald Trump's personal lawyer promised that the Trump Organization would donate hotel profits from…nymag.com
So if you represent a foreign government who desires to get something out of Trump, spend a lot of money at one or more of his hotels. Or golf courses. Or even better yet, grant him permits to build hotels in your country if you want a favor from him. And yes — this IS a violation of the Emoluments Clause. One that Trump commits quite openly. One doesn’t need an investigation to see this.