• Senior Professor, and Brent Scowcroft Chair Emeritus, Bush School of Government & Public Service, Texas A&M University
Radical policy shifts are a hallmark of the Trump administration. On May 8, the president announced that the U.S. would withdraw from the international Iran nuclear deal. Reuters/Jonathan Ernst

Presidents often reverse US foreign policy — how Trump handles setbacks is what matters most now

Many presidents have radically changed US foreign policy. Truman created his own doctrine. Carter gave up the Panama Canal. But a presidential historian sees danger in Trump’s decision-making style.

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