This volume examines variation in the ways Congress has engaged federal agencies overseeing our nation's national security.In an increasingly complex and unpredictable world, a growing number of observers and practitioners have called for a reexamination of our national security system. This volume examines variation in the ways Congress has engaged federal agencies overseeing our nation's national security as well as various domestic political determinants of security policy.In an increasingly complex and unpredictable world, a growing number of observers and practitioners have called for a reexamination of our national security system. This volume examines variation in the ways Congress has engaged federal agencies overseeing our nation's national security as well as various domestic political determinants of security policy.In an increasingly complex and unpredictable world, a growing number of observers and practitioners have called for a reexamination of our national security system. Central to any such reform effort is an evaluation of Congress. Is Congress adequately organized to deal with national security issues in an integrated and coordinated manner? How have developments in Congress over the past few decades, such as heightened partisanship, message politics, partycommittee relationships, and bicameral relations, affected topical security issues? This volume examines variation in the ways Congress has engaged federal agencies overseeing our nation's national security as well as various domestic political determinants of security policy.Part I. Historical and Institutional Challenges: 1. Congress and national security David P. Auerswald and Colton C. Campbell; 2. Congress and US foreign policy: an overview Robert David Johnson; 3. Institutional challenges confronting congress post 9/11: partisan polarization and effective oversight Mark J. Oleszek and Walter J. Oleszek; Part II. Oversight Challenges: 4. Congress and defense Pat Towell; 5. Congress and hols”