Trump says US may not defend NATO allies if needed

Donald Trump said the United States might not come to the defense of NATO allies if they were attacked, questioning the value of the alliance. He argued that NATO has not helped the U.S. with issues involving Iran and the Strait of Hormuz.

Trump's comments have renewed focus on NATO's Article 5, which states that an attack on one member is an attack on all. He also suggested a new 'pay to play' model for the alliance.