It’s never easy to extricate yourself from a fling that got way too serious. But that’s exactly what many conservatives are trying to do after a few heady years of Sarah Palin infatuation. In the wake of Palin’s deeply unserious reality TV show and her embarrassing “blood libel” video, the bloom’s worn off the rose, rather definitively. In fact, those incidents may have provided just the convenient excuses the GOP establishment was looking for.Now, with the 20...