The US has had worse structural power imbalances in the past. It’s gotten over them (after a generation or more) by

- coalition shifts - every election, new groups going and out of each party

- demographic shifts - shrinking / growing / moving around of different groups

- external shock - war / depression / ?? changes incentives of governance (see Civil War, Great Depression)

- hegemons dilemma - the in power party over time goes through in fighting, over confidence, etc (see Republicans becoming corrupt in The Gilded Age)

Alternate constitutional order can mean a lot besides amendments - or even using Federal power. It can be about organizing economic power to reject illegitimacy. It can mean organizing the Democratic Party differently as more of a shadow set of social institutions that support people. It can mean leveraging state power, and building coalitions of blue states. Or other creative approaches to power.

Don't overlook the influence of global soft power and the non-profit sector.

Demographic shifts and a robust social safety net are also naturally reshaping the landscape