No, Ukraine and Georgia are Russian sphere of influence. Russia has more stakes in the matter and would be more likely to use nukes. Same thing with North and south America, the US would have the advantages and call it bluff.I don't get why some people seem to be ignoring the fact that MAD works MUTUALLY. By your logic, the US could just nuke Kaliningrad and demand from the Kremlin to accept Georgia and Ukraine into NATO along with a Belarusian regime change by nuclear ultimatum.
Where comes the idea from that Russians are so keen on burning in nuclear fire?