> Foreign leaders staying in the hotel chain of the sitting President is pretty blatant corruption.

That's about the foreign emoluments clause (which already applies to other public officials including Congress), not the Presidential (domestic) emoluments clause, which is about the President getting money or other material benefit other than those legally due to his office from the federal or state government (which was also an issue with Trump's DC hotel, for many reasons, just not “foreign leaders staying there”.)