Hasn’t NATO outlived it’s usefulness? What purpose does it serve except to allow the European countries to cut their own defense spending and shift responsibility for their protection to us? The U.S. could easily withdraw from NATO without weakening our defense position in the slightest.
Of course we could. However, then we would lose the legal cover for being the 300lb military gorilla that dominates the world with the other NATO members whose military we control under NATO, being our allies but really client states that do our bidding.
Just like the Warsaw Pact during the cold war that had many nations as members but only the most naive didn't realize that it was the Soviet Union that was the top dog and the others were client states and did its bidding.