US, Iran woo rival Kurdish factions in battle against IS -al Monitor

Interesting and fairly detailed discussion of how Iran has been supporting one part of the Kurdish ruling coalition (the PUK) while the US has supported the other (the KDP). This could be a stable arrangement, allowing the US and Iran de facto cooperation without formal coordination. Iran’s relationship with the PUK predates the current crisis, while the KDP has had better relations with Turkey, so the divergence is nothing new. The test will come if Iran and the US start having different preferences on the ground, and start pulling the KRG in different directions.

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