U.S. Secretary of State Antony Blinken departed for Brussels on Tuesday, and meanwhile, President-elect Donald Trump's possible moves to support Ukraine, NATO and duties are raising serious questions and concerns among European officials, CNN reported.

Since the U.S. election, European leaders like Emmanuel Macron have promised a “more united, stronger and more sovereign Europe,” while governments like Olaf Scholz's in Germany are on the verge of collapse.

“There has been a strategic awakening that we must embrace as Europeans. We cannot trust our security to the Americans forever,” Macron said on Thursday.

For their part, Trump and his presidential candidate J.D. Vance have strongly questioned whether the U.S. will continue to support Kiev as the war has dragged on for more than two and a half years after Russian forces launched a full-scale invasion. Moreover, Trump has made remarks that suggest the U.S. may pressure Ukraine to agree to an uneasy truce with Russia. During his campaign, Trump also said that he would only adhere to NATO's mutual defense commitments for countries that allocate enough of their annual budget to defense.

Trump said that “one of the presidents of a big country” at one point asked him if the U.S. would defend the country if Russia invaded, even if it “wouldn't pay.”

“No, I would not defend you,” Trump told that president. - In fact, I would encourage them to do whatever the hell they want. You have to pay. You have to pay your bills.”