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Iran and Russia working to push US out of Syria, Pentagon official says
(www.washingtonexaminer.com)
_A study of the influence of such factors as geography, economics, and demography on the politics and especially the foreign policy of a state_
SS: As geopolitical polarization increases, Iran and Russian cooperation also improves. Expanding their activities outside if Caspian weapons trading, Iran and Russia seek to pressure the US out if the Levant.