A rapprochement between the US and Iran — now possible because of the domestic political needs of both governments — would change the global strategic landscape. A strategic rapprochement between the two once-allied states, estranged since 1979, would cut a swathe through the geo-strategic reach of Russia and the People’s Republic of China (PRC) into the Persian Gulf/Middle East, and revive the prospect of a return of the US to influence in Central Asia.

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