Jordan Tama, an awardee of a Negotiating Agreement in Congress grant (a component of the SSRC’s Anxieties of Democracy program) identifies an intriguing anomaly: greater bipartisanship in the US Congress on foreign policy than domestic issues. Tama examines the different forms this aisle-crossing may take—sometimes in broad opposition to the president’s policy preferences, and at other times when intraparty factions unite across party lines. He sees ideology, interest group politics, and institutional incentives as the key sources for foreign policy bipartisanship, and concludes with how these dynamics are playing out in the Trump administration.