[Going nuclear is never going to be an option right up to the point that a nuclear capable country is about to lose a war on their own territory. Then it will be the only option.]
Hitler tried to pull the temple down around him. I doubt any other leader, democratic or otherwise, would. Hitler wasn’t right in the head.
It will never be an option in the event of conventional defeat.
I respectfully have to disagree. You dont think Kim Jong-un or the Iranians would use nuclear weapons if they were about to lose a real war? I would seriously question what China or Russia, or the even the U.S. would do. Hell, we used them and we werent even losing. Remember nukes dont necessarily mean destroying an entire country. Tactical nuclear weapons exist for a reason.