I’m not an attorney, but I assume that every attorney is expected to swear an oath to, and abide by, a code of conduct as one condition of securing and maintaining a license to practice law. I also assume that any such code would prohibit licensed attorneys from engaging in illegal and/or unethical activities, and violations should be grounds for possible disbarment.
Rudy Giuliani has no official position in the federal government; both he and President Trump have repeatedly said that he is simply the “personal attorney” for Trump. Yet Giuliani’s name comes up often in testimony about recent dealings with the Ukraine.
Giuliani clearly seems to have overstepped his authority by appearing to speak on behalf of the American government. Such misrepresentations are at least unethical (perhaps illegal?) and should lead to consideration of disbarment for Giuliani.