VietnamVet – Trump was such an embarrassment to the sophisticated power elite and their courtesans in both style and policy. Both (soft) coup-worthy infractions of normalcy. Well. Trump seems to have been fully socialized into Blob conformance, if only in policy.
Sanders is the only contender and – like Trump – is embarrassing for reasons of style and policy. With Mayor Pete, the power elite may have found their foil – but I think not.
Your concern re (global) civil war is, I think, well founded. This really does feel like the last chance.
This about Pete is long but informative.