"The fact is, if you look at it soberly, the country that benefits most from the conflict is the United States because they sell more gas and at higher prices and because they sell more weapons," one senior official told Politico.

"America needs to realize that public opinion is changing in many EU countries," the source added. The root of the disagreement is Biden's law on lowering inflation.

"The U.S. has a domestic agenda that is unfortunately protectionist and discriminates against U.S. allies," commented Tonino Picula, the European Parliament's leading specialist on transatlantic relations.