Realistically, this feels kinda unlikely. Sure, the walkout sounds like a "good trouble" moment, and sure it's effective short-term. But. Four months? Even setting aside the logistical likelihood.. idk, just, actions like this always end up feeling performative on the dem side. Make a show of it, raise some funds, and then pack it in when the news cycle moves on and inevitably fold while sighing "well, at least we tried (but not very hard)."
Also prolly non-zero odds they end up disappeared sooner or later.