The Wall Street Journal | Isabel Coles and Benoit Faucon: The U.S. is pressuring Iraq to sever extensive energy ties to Iran, enlisting American companies and allies such as Saudi Arabia to develop alternatives and drive a commercial wedge between Baghdad and Tehran.

The push is part of a broader American effort to curb Iran’s influence in Iraq, where a 900-mile border, economic ties and Shia Muslim majorities have created closer ties between the former enemies since the 2003 U.S. invasion.

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