NATO Secretary-General Mark Rutte has warned that a Russian victory over Ukraine would undermine the dissuasive force of the world’s biggest military alliance and could cost trillions of dollars to restore the organization's credibility.

Ukraine is working to set up a meeting between President Volodymyr Zelenskiy and U.S. President Donald Trump, Zelenskiy said on Tuesday, after giving a speech calling on European leaders to do more to defend the continent.

President Donald Trump said Wednesday he would impose high tariffs on Russia if President Vladimir Putin does not bring a stop to the "ridiculous" war in Ukraine. "Settle now, and STOP this ridiculous War!

NATO Secretary General Mark Rutte on Thursday called for the U.S. to continue supplying Ukraine and said Europe would pay the bill. Speaking at an event at the World Economic Forum in Davos, the NATO chief said the alliance must invest more in defence,