The Foreign Emoluments Clause of the Constitution requires that all federal officials, including the President, seek and obtain the affirmative consent of Congress before accepting any benefits from foreign states. Our nation’s Founders concluded that this requirement was the only way to prevent undue foreign influence on American officials and to ensure that those officials act in the national interest, not their own financial self-interest. Because President Trump is accepting numerous financial benefits from foreign governments through his business empire without having first obtained the consent of Congress, Senator Richard Blumenthal, Representative Jerrold Nadler, and approximately 200 other Members of Congress are asking the federal courts to compel the President to comply with the Constitution.
https://www.theusconstitution.org/litigation/trump-and-foreign-emoluments-clause/