Trump has said he will withdraw the US from NATO.
I'm pro EU - but militarily it scares the crap out of me.
It has become very successful during a long period of peace.
But you cannot have 27 nations all defending themselves with no central control. It's a recipe for disaster. As an economic union it could not efficiently defend itself if attacked. Some go and some wait is a risk.
The EU has wealth but is run by accountants. It needs fully equipped centralised forces. Now.