The Chicago Council on Global Affairs has been tracking American views on foreign policy since the end of the Vietnam War. Last week, it released its 2025 survey—and the results point to a widening partisan divide on some of the most fundamental questions about America's role in the world.

That was not always the case. For most of the past 50 years, Democrats, Republicans, and independents largely agreed on the proper role of the United States in the world. There were always differences, of course, but they tended to exist at the margins. On big-picture questions—such as alliances and working cooperatively with other countries—there was broad consensus. That consensus began to shift in 2015 with Donald Trump's entry into the American political scene. Now, ten years later, this latest survey shows partisan divides that are deeper than ever. America's domestic polarization has finally caught up with its foreign policy.

To discuss these survey results, I'm joined by Jordan Tama, a professor at American University in Washington, DC, who specializes in the intersection of American public opinion and foreign policy. We begin by discussing the historical sources of bipartisan foreign policy consensus, before turning to a longer conversation about how and why that consensus has fractured—and what this shift suggests about the future of American foreign policy.

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