Likely response is bombing whatever is left of Ukrainian power generation and potentially arming the Houthis.
The analysis I’ve seen indicates that these weapons will not fundamentally alter the course of the war.
Kursk was a gamble to improve Ukraine’s negotiating position, which has gotten consistently worse.
Maybe I'm wrong, but with the river north of the Ukrainian border, it seemed like they wanted that as new easier to maintain defensive line.
The defenses in the north were affected by incompetence or corruption, so the push north came across a little like shoring up their positions to need fewer men in the long run.
It is not enough to warrant giving the barking dog what it demands from others and it does not deserve, as that will teach it that such barking is okay.
In any case, it is a much weaker dog than you, and the dog has fewer functioning nuclear weapons and delivery systems. Ultimately the dog won't bite with nuclear weapons because it knows you bite harder and it will lose.
Come to think of it, such an aggressive dog which repeatedly barks and attacks its own neighbors unprovoked is a threat to the community and should be put down.
The analysis I’ve seen indicates that these weapons will not fundamentally alter the course of the war. Kursk was a gamble to improve Ukraine’s negotiating position, which has gotten consistently worse.