> Mainstream Christianity gave us Trump, so it's not exactly the moral foundation it claimed to be.

I think it's worth taking a closer look at what Trump is to the American and religious right. Some people think he's their savior, and that they approve of his actions. I don't. I think he's their champion, in the historical sense - a champion is one who fights for you. A champion is not above a king, but is useful, admired, and dear. I think the usefulness of Trump was proportional to the number of culture wars that the American Christian population was losing a decade ago, and is now winning. Some of those battles were dumb, like even AOC deleted her pronouns after the last election, but the fact that they were being fought meant that people needed someone effective to fight for them, and the most skilled fighter was Trump.

> There are plenty of ... factions that could potentially salvage it, but how will any of them get traction?

I think they need to figure out how to provide the most value possible to the population, and I think that following the teachings of Jesus is integral to this. I also think there are a number of things that must yet be figured out by trial and error.