Politics To Fully Appreciate What Trump’s Iran War Has Squandered, You Have to Go Back 11 Years Wendy Sherman was there at a moment when peace between Iran and the U.S. seemed possible. Now she reflects on all that’s been lost. Demonstrators outside the Iraq Embassy in Tehran protesting the U.S.–Israeli war with Iran. Majid Saeedi/Getty Images Sign up for the Slatest to get the most insightful analysis, criticism, and advice out there, delivered to your inbox daily. Wendy Sherman was on the verge of tears. It was July 2015, and Sherman, then a top Obama administration official at the State Department, had just stepped up to a lectern in a drab conference room. The tears, Sherman reassured her rapt audience, were “largely exhaustion.” She had flown back to D.C. the night before from Vienna, where she had led the U.S. delegation that successfully negotiated the Iran nuclear deal.…