Way back when Obama had to get special permission from Congress to receive the money that went with the absurd nobel prize he was given.
Fast forward to today. Trump simply treats congress with utter contempt on the same topic. He has made no action what so ever to overcome this . He has decided against a blind trust which most Presidents in the past have used.He clearly has no understanding of conflict of interest means
It is therefore Congresses constitutional duty to impeach Trump until he conforms with the US constitution.