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

NATO has protected American lives through the Cold War, the long struggle against terrorism, and every major crisis of the modern era.

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

President Trump on Thursday said the United States should have put NATO to the “test” when it comes to the U.S. southern border by invoking Article 5, in which the multilateral organization states an armed attack against one member is considered an attack against all,

The White House on Friday stood by Trump’s characterization of NATO, emphasizing the disparities within the transatlantic alliance.

By Gram Slattery, Jonathan Landay and Humeyra Pamuk WASHINGTON, Jan 20 (Reuters) - The United States plans to reduce the number of personnel it has stationed within several key NATO command centers, a move that could intensify concerns in Europe about Washington's commitment to the alliance,

The Trump administration has repeatedly said the U.S. should be in control of Greenland, which is part of Denmark and NATO.

Italian PM Giorgia Meloni calls Trump's NATO comments about Afghanistan "unacceptable," defending Italy's sacrifice of 53 soldiers killed in the conflict.

Pakistan, Jan. 23 -- The United States and NATO have reached a preliminary framework on Greenland, proposing limited American authority and resource access, reflecting growing strategic focus on Arctic security and economic interests.