Contents -- List of Figures -- List of Tables -- Preface -- Introduction: Congress and Foreign Policy from an International Relations Perspective -- 1. The Study of Congressional Behavior over Time -- 2. Conceptualizing, Explaining, and Measuring Congressional Behavior -- 3. Long-Term Trends in Foreign Policy Activity in the Senate and the Impact of Critical Issues -- 4. Disagreement over Foreign Policy in the Senate -- 5. Variations in Behavior by Issue Area -- 6. Conclusion: Theories and Research on Congressional Behavior on Foreign Policy -- Appendix: Collection and Coding of Data -- Notes -- References -- Author Index -- Subject Index.