This paper proceeds as follows. First, I offer a brief overview of how the end of the Cold War changed U.S. foreign-policy-making processes, emphasizing new voting contexts for members of Congress concerning the issues of human rights and nuclear nonproliferation. Then the existing literature on bill cosponsorship and its impacts on the congressional politics of U.S. foreign policy toward North Korea is reviewed. After proposing several hypotheses about members’ reasons for cosponsoring North Korea bills and resolutions, I use logistic regression analysis to test what determines House members’ cosponsorship of bills addressing U.S. foreign policy toward the DPRK.