Efforts by the Obama administration to stem criticism of its diplomacy with Iran have included threats to nations involved in the talks, including U.S. allies, according to Western sources familiar with White House efforts to quell fears it will permit Iran to retain aspects of its nuclear weapons program.

A series of conversations between top American and French officials, including between President Obama and French President Francois Hollande, have seen Americans engage in behavior described as bullying by sources who spoke to the Washington Free Beacon.

The disagreement over France’s cautious position in regard to Iran threatens to erode U.S. relations with Paris, sources said.

Tension between Washington and Paris comes amid frustration by other U.S. allies, such as Saudi Arabia and Israel. The White House responded to this criticism by engaging in public campaigns analysts worry will endanger American interests.