Modern Dems don't shoot first. Something extreme has to happen but executing sitting justices is probably plan C or D. They are no doubt going to try to win and be right (as far as playing by the old rules will allow) first, and if they even try to toe the line of the dark side, it will be a Hail Mary at the last minute. Likely in the buyers remorse/lame duck period.
Edit: Dems see it as the nuclear option that it is. Republicans see it as a bubble-hearth with no cooldown.