Everything Old Is New Again: The Persistence of Republican Opposition to Multilateralism in American Foreign Policy

Abstract The last two Republican presidents’ hostility to multilateralism has produced striking departures from postwar American foreign policy, but this position is not as new as it sometimes appears. It has deep historical roots in the conservative wing of the Republican Party. Using data on congressional voting and bill sponsorship, we show that Republicans, especially those from the party's conservative wing, have tended to oppose multilateral rules for more than a century. This position fit logically into the broader foreign policy that Republican presidents developed before World War I but posed problems in light of the changing conditions during the mid-twentieth century. The importance of multilateral cooperation for U.S. national security during the Cold War and the growing international competitiveness of American manufacturing split the party on multilateral rules, but it did not reverse the conservative wing's longstanding skepticism of them. Congressional leaders’ efforts to keep consequential choices about multilateral rules off the legislative agenda for most of the postwar era contributed to the persistence of this position. This move spared conservative members of Congress from confronting the costs of opposing multilateral institutions, giving them little incentive to challenge ideological orthodoxy.