In this May 4, 2016, file photo, Secretary of State John Kerry, left, speaks with Secretary of Energy Ernest Moniz at the State Department in Washington. Former Obama administration officials who played central roles in brokering the Iran nuclear agreement are scheduled to brief congressional Democrats on the merits of the international accord as President Donald Trump prepares to announce a decision that could lead to an unraveling of the pact. (AP Photo/Alex Brandon)
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