What actions does that involve? Which treaties would that break? Which other treaties can we then be ready for others to assume we’ll break? How will we respond to that in a way that prevents cascading trust collapse? Is there any way to guarantee to other allies that we won’t turn on them when expedient? How can we guarantee peace is even on the table if we’re suddenly regarded by the whole world as a betrayer? As even less reliable than we’ve already become?
This seems to me like a signal that Democrats are formally cementing as a conservative / neoliberal party. Which makes sense. I guess maybe the upside is that maybe it will carve out room for an adjacent political body to the left as well, sort of like what happened with the tea party.