On Friday, a little more than a week after she launched the briefest of campaigns to head the NRCC, California GOP Rep. Mimi Walters conceded defeat to Democrat Katie Porter in the election for the state’s 45th Congressional District. Walters’ abortive bid to lead the GOP’s House campaign arm was the last, but far from the only, example of how little she understood how much electoral danger she was in—a danger that crescendoed after Election Day.