Watching the video of Sarah Palin’s appearance with William Shatner on the “Tonight Show” with Conan O’Brien, the one word that came to mind was style. Yet, there was more to it than that. After all, she entered the arena of late night television, a stage that has excoriated her routinely — the “enemy camp” as Chris Matthews might say. Mrs. Palin's has been scoffed at before by Mr. O’Brien. The show has featured William Shatner mocking Mrs. Palin’s tweets by reading them as dramatic recitations. Still, Mrs. Palin handled her appearance with the aplomb of Beyonce at the MTV...