Did the US allow all the other nuclear countries to develop nuclear weapons? There are quite a few states that could easily and quickly develop their own nuclear deterrent and the US is in a much worse position now to deter them from that.

The current administration WANTS Europe to develop the military necessary to defend themselves so we don’t have to pay for it. We’ll probably send them the schematics if they haven’t already infiltrated whatever servers we keep them on.

What if France 'donated' some nukes to every EU country (okay, maybe not Hungary) ?

It won't happen, but I wonder what could the US possibly do about it.