Danish military veterans and others staged a protest march against U.S. President Donald Trump's recent comments regarding NATO members and Greenland.

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.

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

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.

President Trump suggested the U.S. should have tested NATO’s commitment by invoking Article 5 in response to the southern border crisis.

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.

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'