Qatari Gifts

Is it legal for a foreign country to gift a $400 million plane to the President of the United States for his personal use?

Not according to the American Constitution, Article I, Section 9, Clause 8:

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.

The prohibition against foreign gifts to the President or other office holder, absent Congressional approval, is “the only ethics and conflicts rule that was put directly in the Constitution by the founders and the framers.”