The House Appropriations Committee's voice vote on June 29, to approve an amendment repealing the 2001 Authorization for the Use of Military Force, came as a surprise to congressional leaders; reporters on Capitol Hill; and the amendment's sponsor, Rep. Barbara Lee. The AUMF is the controversial legal authority under which most U.S. counterterrorism activities are conducted. Lee has been on a mission to repeal it since Sept. 14, 2001, when she cast the one and only vote in Congress against the original authorization. In the 16 years that followed, Lee has sponsored numerous bills ... intended to overturn the authorization, to no avail. The vote in June, the first time a congressional committee had passed an AUMF repeal, showed that she's finally no longer alone in believing that the authorization she describes as a blank check" is no good. In the end, the House Rules Committee stripped Lee's amendment out of the bill. History has vindicated many of Lee's concerns about the AUMF: It has, as she warned, dramatically expanded the president's power to use military force, reduced congressional oversight, and vastly grown the U.S. military footprint around the world with no end in sight to the escalation. The measure includes no time or geographic distinctions, and three presidential administrations have taken full advantage of that ambiguity. A 2016 Congressional Research Service report found that the AUMF's authority had been invoked 37 times for operations in 14 countries.