[Note: This is a guest post by Sean Kay, Robson Professor of Politics at Ohio Wesleyan University and Mershon Associate at the Mershon Center for International Security Studies at the Ohio State University. He has long-researched and written on NATO policy and worked in the US Department of Defense during the first round of NATO enlargement planning. His forthcoming book is America’s Search for Security: The Triumph of Idealism and the Return...

