I think what he wants is a rebuke of the Rats actions not a lawsuit.
I know, but he mentioned 1st Amendment rights. The Senators enjoy magnified 1st Amendment Rights by being totally immune from slander or libel suits for their speeches. A Senator can literally say absolutely anything they want about you or your company and you cannot sue them or call them into account. That’s why Rush dared Reid to come and say those things to his face...................