Paul Waldman nails it:
Just a few years ago [Sarah Palin] was the mayor of a tiny town in Alaska, and today she's one of the most famous people in America. Despite her modest talents, there are millions of people who believe, and tell her constantly, that she ought to be the most powerful person on planet Earth. She's made millions of dollars in the last two years, for the easiest of things -- giving some speeches, having ghost-writers pen a couple of books, doing appearances on Fox, letting cameras trail her around while she goes fishing. And yet she can barely open her mouth without going on and on about how terribly victimized she is, and how everyone has done her wrong.