In this opinion piece, Protect Democracy’s Anne Tindall and Grant Tudor argue that “Congress enjoys an expansive constitutional authority to investigate just about any matter it chooses, and to enforce that authority through compulsory tools like subpoenas. The Supreme Court has explained that the scope of this investigative power ‘is as penetrating and far-reaching as the potential power to enact and appropriate under the Constitution.’ So long as the inquiry could plausibly relate to an issue ‘on which legislation could be had’—in this case, efforts to pass new judicial ethics laws—Congress is well within constitutional bounds to exercise its investigative muscles.”