Why is Harry Reid acting like David Koresh? Becuase conservatives are winning. In 1987, Rush Limbaugh sat down at a microphone at radio station KFBK-AM in Sacramento and began broadcasting something called "The Rush Limbaugh Show." The rest is history. The "rest"--the inexorable 15-year rise of conservative ideas and clout across what Howard Stern calls "all media"--is described in a provocative new book by Brian C. Anderson, "South Park Conservatives." What was once a mostly exclusive liberal country club--television, the press, book publishing, even the campuses--has become heavily integrated with aggressive, even crude, conservatives. As described by Mr. Anderson, a...