We also should not forget the four years most recently where the sitting US president was claiming NATO/UN/ANZUS/other military defence pacts to be a farse beca

We also should not forget the four years most recently where the sitting US president was claiming NATO/UN/ANZUS/other military defence pacts to be a farse because the US wasn't deriving an immediate and obvious dollar value from them. To the point where he made statements alluding to those other countries finding themselves without military support if they didn't pay the US for protection. He literally tried to apply a mob protection racket via insinuation over international politics and treaties. Any sane nation considering their own self defence and sovereignty would be looking to bolster their own position instead of relying solely on that sort of unreliable and borderline abusive relationship.