I hope you all are not stupid enough to believe what the BBC states about Mr. Trump. The BBC is a left-wing propaganda outlet.
First, Mr. Trump has not been elected President or sworn into office yet, so he has no authority in the matter. More importantly, the dimwits at the BBC fail to grasp the fact that Article II of the US Constitution requires the President to get approval from Congress before any international treaty agreement he negotiates becomes binding US law.
Ever wonder what the "T" in NATO stands for?