1. Introduction: Congress, Factions, and the Battle for U.S. Foreign Policy
2. Factionalism and Foreign Policy: A Model of Minority Influence
3. “We the People?”: Historical Foundations of Factionalism
4. The Tea Party, the Freedom Caucus, and the Obama Administration
5. Progressive Caucus Activism During the Obama Administration
6. The Freedom Caucus and Factionalism in the Trump Era
7. Progressives and Foreign Policy in the Trump Era
8. Conclusion: The Battle Continues.