In the treaty of Versailles and the SALT II Treaty, years of painstaking diplomatic effort were lost when the United States Senate refused to provide its consent to ratification. This book provides the first comparative assessment ever written of executive-congressional relations and the arms control treaty ratification process. A renowned team of historians, political scientists, and policy analysts look at seven case studies, ranging from Versailles to the INF Treaty, to explore the myriad ways to win and lose treaty ratification battles. This book constitutes a strong marriage of scholarship and public policy.