> there is simply no coming back from the fact that it's been laid bare how quickly and easily vast swaths of our political leadership would sell out to completely destroy our Constitutional principles.

I think you are right. At the same time it’s also an opportunity to get rid of an outdated constitution and have another go, with the benefit of 250 more years of experience. Just don’t fall into complacency: this government was voted in, partly because of a toxic and polarised culture that sees compromise and consensus as weaknesses (and gerrymandering, and the electoral college, and disenfranchisement, fair enough), but also partly because a lot of people did not bother showing up. Republicans have had a grassroots strategy for decades, where they seized everything they could get, even very modest positions. That’s how they progressively ended up redrawing maps and steering politics at the state or county level. You need a long term plan and a good strategy to counter this. So don’t give up (I beg you, from the other side of the Atlantic). Even if things are bad now, they can get better tomorrow.