Europe is openly talking about its own cooperative nuclear umbrella. Trump is correct that he deserves 100% of credit/blame for that, taking the heat for Putin.
It will be done by your friends the French, even if not to everyone. Poland is very keen on it.
In fact they are reopening and massively developing an airbase that will be hosting nukes near Colmar, 200 km from the German border. That's a 6 minute flight for a Dassault Rafale.