Normally smart people, like Mitt Romney, discarded all their best instincts to suck up to this ragtag assortment of self-appointed G.O.P. commissars, each representing a different slice of what came to be Republican orthodoxy — climate change is a hoax; abortion, even in the case of rape or incest, is impermissible; even common-sense gun laws must be opposed, no matter how many kids get murdered; taxes must always be cut and safety nets shrunk, no matter what the economic context; Obamacare must be destroyed, even though it was based on a Republican idea; and Iraq was a success even though it was a mess.