Ha. Missed your question. I was revisiting some of my old stories.

Nuke are great when they are not used. If Putin uses it he will lose and more than that his cronies will turn against him. It will be end of his reign as he wont be able to contol the pieces that allow him to control Russia. On top of it, it will turn the entire world against Russia, so it is no go area. Why hasnt he used it yet, if it is so useful. That is the whole point.

Yes, Biden wants either Putin to withdraw on his own or things to turn so bad inside Russia that Putin is thrown. That seems to be thier plan.