At the Council on Foreign Relations, Michael Doran debates Ray Takeyh and Barbara Slavin on President Joe Biden’s failed Iran diplomacy, the prospect of a nuclear Iran, and the threat Tehran poses to the global order.

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Gunners from the Armed Forces of Ukraine fire at Russian position with a 155 mm self-propelled howitzer 2C22 in the Kharkiv region on April 21, 2024. (Anatolii Stepanov/AFP via Getty Images)