In William Gibson’s novel Neuromancer one of the villains has a particularly sick fetish: He gets off on betraying people.
There is no doubt that this describes Paul Ryan and other Republican traitors. The risks they take with their political careers are far beyond the bounds of common sense. Some of them, indeed, were successfully primaried by the Tea Party during its heyday.
Cool logic cannot explain the persistence and depth of their betrayals of their base. Something else is going on there, something darker, the province of pathological psychology.