It’s been no secret for a while that Sarah Palin, erstwhile vice-president candidate, is no longer a serious political contender — for evidence of that transition, note that even among her faithful, at CPAC this year, she got just 2 percent of the vote in the straw poll, tied with Condoleezza Rice. But as her crowd-pleasing performance in the very final speech of that event — and her lucrative contract with Fox News and huge social-media following — indicate, she’s gone from being a potential political leader to something of a cultural totem. That means her speeches have gone from...