With only three remaining members of what is supposed to be a seven-member body, the World Trade Organization's (WTO) Appellate Body may soon cease to function. Since 2016, the United States has blocked the reappointment of Appellate Body members and rejected over a dozen proposals to launch selection processes that could fill the remaining vacancies. As a lead reason for these blocks, the United States has cited concerns about the practice whereby members whose terms have expired continue to serve on appeals to which they were previously appointed. On December 10, 2019, the terms of two Appellate Body members will expire, leaving only one member remaining. Because the WTO's dispute settlement process requires three Appellate Body members for each appeal, WTO members will be unable to make any new appeals by this year's end unless a solution emerges to the current impasse.