The close adviser to President Donald Trump has publicly supported the United States withdrawing from the military alliance.

Trump said he told NATO allies that if they’re not going to pay their bills, he won’t defend them.

Asked about NATO Article 5 commitment, Trump says U.S. "not going to defend" allies that fail to meet his spending ...

Uneasiness grows over continued U.S. support for the 75-year-old alliance as Trump casts doubt on support from other members ...

European Union leaders on Friday downplayed skepticism from U.S. President Donald Trump about solidarity among NATO members ...

The president has discussed possibly favoring members of the alliance that spend a set percentage of their GDP on defense, ...

Higher European defence budgets and a ramp-up of production by military equipment industries are necessary to secure Europe, ...

Trump’s nominee to serve as the U.S. ambassador to NATO said his commitment to the alliance is “ironclad.” Trump contradicted ...

Trump said on Thursday he's "not so sure" NATO allies would come to America's defense, despite its Article 5 being invoked ...

Europe is staring down the barrel of a stark new reality where the United States being the backbone of NATO – the alliance ...

U.S. President Donald Trump cast doubt on Thursday on his willingness to defend Washington's NATO allies, saying he would not ...