The US pays more to NATO for a reason, because up until Trump became President it was seen as a necessary buffer against arch enemy Russia, and the US wanted bases in European countries and funded them accordingly for the same reason, it was never a question of largesse on behalf of the US. Now, however, it doesn’t seem to matter very much whether Russia has expansionist desires, because the US are defanging Ukraine and by opposing NATO or refusing to pay into it, are defanging Europe as well.
So, if the US truly want to take this to its natural conclusion I would advise them to get their bases the hell out of the UK and Europe. Europe should unite in defending themselves against Russia and the US.