Nato was created to keep Marxism in check. The Soviet Union fell decades ago. NATO has no purpose anymore. Most of its members are more Marxist than the Russians now.
Here's how Trump really pisses off the dem/leftists - he leaves the UN, sends them packing back to their countries. . .and coverts the UN building to his Presidential Library.
Trump says he might withdraw from NATO. He is trying to blackmail NATO because they will not support his war with Iran. President Trump can't pull the US out of NATO without congressional support, but he can order all our troops home, cut funding and watch everyone cry.