Europe should welcome rather than rebuff U.S. President Donald Trump's call for other NATO members to ramp up their military spending, Polish Prime Minister Donald Tusk said on Wednesday, stressing the importance of security to the continent.

Congress passed legislation that a president cannot unilaterally withdraw from NATO, setting up a major legal fight if Trump tries to pull the US out.

While Canada’s spending on defence is less than 2 per cent, no NATO member spends as much as what Trump is requesting

Transatlantic military alliance chief echoes Ukrainian leader Volodymyr Zelenskyy in stinging remarks at the World Economic Forum.

Anders Vistisen, a Danish member of the European Parliament, has told U.S. President Donald Trump to "f*** off" after Trump again expressed interest in purchasing the island of Greenland. Newsweek has contacted the White House and Vistisen for comment via email.

President Trump doubled down on the prospect of across-the-board tariffs in a video appearance to business executives and politicians gathered in Davos, Switzerland.

Russia on Thursday rejected the idea of NATO countries sending peacekeeping troops to Ukraine in the event of a ceasefire in the war with Russia, saying such a move would threaten to cause an "uncontrollable escalation".

WASHINGTON - President Donald Trump said on Thursday that the "Golden Age" of America had begun and that it was "back and open for business" while addressing business and political leaders gathered at the World Economic Forum’s annual meeting in Davos, Switzerland.

In December, the United Kingdom joined the Comprehensive Security Integration and Prosperity Agreement. More countries will follow. C-SIPA, as the still-small grouping is known, could soon become the NATO of the Middle East.

Committing 5% of GDP to defense is a fine idea, for the U.S. too.