NATO's ability to deter Russia has taken a huge hit as trust within the alliance erodes. European allies and Canada are investing billions to support Ukraine and boost defense budgets.

"Europe’s relevance will depend on its readiness to live in a world without the Atlantic alliance," writes Ivan Krastev

President Donald Trump has posted private text messages from the head of NATO and France's president to the U.S. President, shortly after Norway's leader confirmed a leaked exchange did show tense correspondence between the Republican and NATO leaders.

The president's push to gain control of Greenland, a Danish territory, has created anxiety about the future of the alliance throughout Europe.

Even the Canadians are drawing up plans for how they might respond to a U.S. invasion.

US President Donald Trump has once again questioned whether NATO allies would “be there” if the United States “ever needed them,” claiming that the alliance’s troops “stayed a little back” from the frontlines in Afghanistan.

Prince Harry and the British Prime Minister slammed Trump over his comments.

Trump suggested to CNBC that the Greenland framework involves mineral rights for the U.S., as well as the administration's proposed "Golden Dome" system.

President Donald Trump has pitched NATO into what could become its worst-ever crisis by threatening new tariffs against US allies who oppose his grab for Greenland against the will of its people.

NATO chief Mark Rutte defends Trump's impact on European defense spending, saying allies wouldn't have reached 2% GDP targets without his pressure.

Find out more about King Charles' reaction to Prince Harry calling out Donald Trump following his claims about NATO allies on SheFinds.com

Slovakia’s prime minister Robert Fico was reportedly concerned by Donald Trump 'psychological state' and told EU leaders it was 'dangerous'