Despite Donald Trump’s tough talk about the Iran nuclear deal during the presidential campaign, there have been some signals since the election that his administration may walk back his threat to cancel the accord. But hostility to Iran seems rampant among Trump’s advisers, meaning the spirit, if not the letter, of the agreement will likely be violated. The costs of reverting to a confrontational approach to Iran would include more regional instability, and doing so would raise serious questions about Trump’s commitment to some international norms and practices.
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