When the US secretary of state, Marco Rubio, delivered a speech at Europe’s biggest security conference in the German city of Munich on February 14, leaders from across the continent were relieved by its content. In contrast to the previous year, when US vice-president J.D. Vance had launched a scathing attack on European-style democracy, Rubio’s tone was far more friendly and conciliatory.

He described the US as a “child of Europe”, assuring European leaders that his country was intent on building a new world order together with what he called “our cherished allies and our oldest friends”. The president of the European Commission, Ursula von der Leyen, said she was “very much reassured” by these remarks.

However, Rubio also repeated several of the Trump administration’s familiar criticisms of Europe’s approach to immigration and climate action, cautioning that the US is prepared to chart its new path alone. And while he claimed his country wants to reinvigorate the transtlantic alliance, Rubio questioned Europe’s will and capacity to do so.

The speech underscored the balance Rubio must strike between aligning himself with the political priorities of Donald Trump and reassuring European partners. Unlike much of the Trump administration, the secretary of state understands that the US needs to be more diplomatic with Europe to achieve its foreign policy objectives.

This isn’t the case with Vance. One year ago, he chastised Europe for its migration policies and accused its........

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