US Secretary of State Marco Rubio heads Wednesday to a NATO meeting in Europe as transatlantic tensions soar, with President Donald Trump slapping tariffs on Europeans and challenging Denmark's sovereignty over Greenland.

Rubio will join two days of talks among NATO foreign ministers in Brussels, a preparation for a June leaders' summit in The Hague.

The new US administration has quickly shown itself ideologically at odds with much of Europe. Vice President JD Vance made the Trump team's European debut in February by calling on Germany to stop shunning the far right.

Rubio will arrive hours after Trump is set to implement sweeping tariffs, part of an effort to remake the global economic order and shatter decades of efforts toward freer trade.

Most European allies are expected to respond quickly and strongly, leading to fears of a global trade war with an epicentre in a........

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