Like I have been saying... If it wasn't for nuclear deterrence, we all would already be in WWIII right now. Nuclear deterrence is what has kept the Western Democracies and Communist China out of this whole thing.
Nuclear deterrence is why we have not had a major World conflict since WWII.
Agreed. I could see something similar to the arrangement Germany, Belgium, Italy and The Netherlands have with the US where they host our nukes. The only problem I see with Ukraine hosting our nukes is that Putin (or his successor(s)) would surely interpret that as some sort of provocative or threatening gesture. He/they wouldn't be wrong, but I would like to believe our intentions would be purer than if the shoe were on his foot though.