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A staff removes the Iranian flag from the stage after a group picture with foreign ministers and representatives of Unites States, Iran, China, Russia, Britain, Germany, France and the European Union during the Iran nuclear talks at Austria International Centre in Vienna, Austria on July 14, 2015. Major powers clinched a historic deal aimed at ensuring Iran does not obtain the nuclear bomb, opening up Tehran's stricken economy and potentially ending decades of bad blood with the West.
A staff removes the Iranian flag from the stage after a group picture with foreign ministers and representatives of Unites States, Iran, China, Russia, Britain, Germany, France and the European Union during the Iran nuclear talks at Austria International Centre in Vienna, Austria on July 14, 2015. Major powers clinched a historic deal aimed at ensuring Iran does not obtain the nuclear bomb, opening up Tehran's stricken economy and potentially ending decades of bad blood with the West.

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CNN's Elise Labott explains how the complex agreement is playing in the 2016 election cycle and what it will mean for whoever succeeds President Obama.

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CNN's Elise Labott explains how the complex agreement is playing in the 2016 election cycle and what it will mean for whoever succeeds President Obama.