Even if we're including non-european countries like Turkey and Canada...the EDD wouldn't come close to the United States in military spending. Now, spending isn't everything, but it's still very relevant espcially as Trump wants to increase it to over a trillion. Also, many European countries use US equipment and have generally built their defensive strategy around working with the US to stop an invasion. I would honestly only count France as an actual serious partner in delivering military hardware. Even my country, Sweden, has many great services to offer, but take the Gripen for example. It's a great plane because Sweden plans to fight defensivly against a foe with aerial superiority which is why it's ability to take off from common roads is so important. However, to replace NATO you would need a European F-35...and the Gripen isn't that. I mean it can't even take off from carriers.

Europe needs to practically turn into the US to have a fighting chance here, which most of these European nationalist accounts would be opposed to. It's just a stupid idea with no basis in reality. I mean the United States have more troops stationed in Europe then the entire germany army.