We've had an attempted take-over of a political party in this country, too. Far left, rather than far right, but both cultist, centred round a charismatic leader with populist policies. Corbyn's Momentum intimidated local branches and tried to deselect MPs. The PLP were marginalised and the membership empowered. Representative Parliamentary Democracy was called 'undemocratic'. One man, one vote, even if MPs represented thousands of votes and were accountable to their constituents, and individual members represented no one but themselves, accountable to no one.
Obviously, there are crucial differences in the 2 countries' political systems, but I think there are lessons to be learned. A pp said anti-Trumpists should resign and form their own party. No. Hold tight to the brand, and, if it's anything like the UK, the real-estate that goes with it. Change UK was a mistake. In the end, it was the Red Wall who scuppered Corbyn.
Support the growing numbers of traditional Reps who have begun to drift away from Trump. Amplify their voices. Prosecute the thugs and the trolls who have driven the sensible silent majority away from local activism. A lot of people voted Labour in 2018 despite, not because of, Corbyn. The same applies to a growing number of the millions who voted for Trump in the popular vote.
Trump's lost them the White House, and the Senate. He's lost his megaphone. He's losing big name donors on a daily basis. Law suits are piling up. Debts will be called in. John Dean said on CNN that he should be ignored. Back to the gossip columns, no longer front page news. He's 74, putting on weight. Time is on our side.
(Wd be very grateful for info on how political parties in the US work on a local level.)