Relations between the U.S. and European Union have been thorny this year with differences over how to support Ukraine, trade tensions and tariffs, dominating a tense period of diplomacy between the power blocs.

But, in a somewhat ironic twist of the ongoing Ukraine war, a shared sense of frustration and suspicion of Russia's refusal to come to the negotiating table has brought the U.S. and EU closer together.

A united front was seen this week, with Washington and Brussels announcing complimentary packages of sanctions targeting Russia's oil and gas industry.

The U.S.and EU are on the same page when it comes to pressuring Russia to bring an end to the war in Ukraine, Andrew Puzder, the U.S. Ambassador to the European Union, told CNBC Thursday.

"President Trump has been adamant that he

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