Rush will still be there, but it’s not really “grassroots Woodstock” anymore without her. Now, because of the letdown, it’s more like grassroots Altamont: Plenty of good acts and one great one to close the show, but an angry, angry crowd nonetheless. The opening-day headliner for the annual CPAC conservative convention February 26-28, Alaska Gov. Sarah Palin, has pulled out, citing state business in Juneau. “We’re obviously disappointed,” said a CPAC official. A spokesman for the three-day confab, organized by the American Conservative Union Foundation and others, said that Palin, the popular former vice presidential nominee, had indicated she would...