Donald Trump's decision to bomb Iran lays bare a major rift within Republican foreign policy. Until recently, the more isolationist "America First" wing seemed ascendant, sidelining the hawks. But that dynamic decisively shifted on Saturday when Trump ordered American strikes on several targets in Iran

My guest today is Andrew Prokop of Vox, who recently wrote a deep dive into the GOP's foreign policy divide. In our conversation, we explore the history of these two Republican camps—and how the debate over Iran is playing out now. We also discuss the potential domestic fallout of dragging the U.S. into another Middle East war.

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