i've talked to left and right wingers in person about this and most seem to agree with this concept or contributed to it. at the vaguest level it's perceived as two groups, the neoliberals/neocons and the populists. the populists have a left (berniecrat, demsoc) and right (trumpian, nazbol-lite) wing. the neos are all the old guard repubs (mitch) and centrist/corporatecrats. at their most basic understanding of this they believe the populists are trying to help the people while the neos only care about the markets. obviously this struggle is being heavily catalyzed by the 2k checks.
I don't think so. The GOP doesn't have a real populist wing, they just have a few LARPers who yell about immigration and trade. The "populist" GOP still opposes minimum wage hikes, unionization, universal healthcare, jobs programs for the American poor, etc. As soon as the "populist" GOP got into power all they did was funnel cash to the rich and now one or two people are pretending to support 2k checks to keep their grift going.
Wake me up when the GOP starts actually challenging the economic power of the ruling class instead of just talking about it.