Two developments last week threaten to weaken Republican control over the investigative agenda of the US House of Representatives. First, House Republicans’ narrow majority continues to shrink, with Representative Mike Gallagher (R-WI), Chairman of the House Select Committee on the CCP, announcing he will leave Congress in mid-April. Second, a Republican member threatened to use a procedural tactic to remove Speaker Mike Johnson (R-LA). As a result, it could prove difficult to enforce committee subpoenas through litigation, or to hold subpoena recipients in contempt of Congress for failure to comply with committee demands. Democrats might also seek changes to House rules and committee practices in exchange for supporting Speaker Johnson, and such concessions could erode Republicans’ ability to unilaterally control investigations. These developments in the House will not, however, impact investigations by Senate committees