The President violates the Title of Nobility Clause, as explained in Article I, Section 9 of the United States Constitution.
The clause states: 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.
Donald Trump has known financial ties with Russia, and owes hundreds of millions of dollars in debt to banks in foreign countries, such as China. The complicated business entanglements create a conflict of interest for national security issues. The American People deserve to see his tax returns.
Donald Trump needs to resign as President of the United States.