Former half-term Gov. Sarah Palin has reportedly packed in her bus tour...halfway through. Real Clear Politics is reporting that Palin and her family have returned to Alaska from their "One Nation" bus tour, despite tentatively scheduled stops in Iowa and South Carolina. From Scott Conroy at RCP: Though Palin and her staff never announced a timeline for the remaining legs of her trip, aides had drafted preliminary itineraries that would have taken her through the Midwest and Southeast at some point this month. But those travel blueprints are now in limbo, RCP has learned, as Palin and her family have...