Russian President Vladimir Putin walks with President of the Islamic Republic of Iran Hassan Ruhani, left, in Ufa, Russia, Thursday, July 9, 2015.

ANALYSIS: America’s New Deal With Iran May Leave Russia Out In The Cold

The implications of the recent Iranian nuclear deal extend far beyond centrifuges and uranium enrichment. Russia, which has long played tensions between Tehran and Washington to its own ends, may know this better than anyone.