How did Poland, Hungary, and the Czech Republic become the newest members of the North Atlantic Treaty Organization? Based on interviews conducted with more than 75 individuals—from Cabinet officials to desk officers—James M. Goldgeier tells the inside story of this controversial Clinton administration initiative. Analyzing the earliest internal deliberations, as well as administration discussions with allies, the Russians, and the United States Senate, Goldgeier demonstrates how a handful of committed policymakers outmaneuvered overwhelming bureaucratic opposition. He shows the role of domestic politics in shaping the evolution of this policy and dissects the national campaign waged by the administration's specially created NATO enlargement ratification office and its outside supporters. Weaving together insights about bureaucratic politics, policy entrepreneurship, and domestic politics, this book provides fresh insights into the American foreign policymaking process.