A protest against the assassination of Qasem Soleimani in Tehran, January 2020
Nazanin Tabatabaee / Reuters

Killing the Iranian commander Qasem Soleimani may well have been the most consequential foreign policy decision of Donald Trump’s presidency. Its repercussions will be felt for days, months, and even years to come—but what exactly they will be depends on what the Trump administration does next.

The strike has been explained by senior U.S. officials as both an effort to deter future Iranian aggression and an act of preventive defense in the face of an imminent attack. Trump and Secretary of State Mike Pompeo are already out crowing with patriotic tweets reminiscent of the “Mission Accomplished” banners

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