How Much Bump Does Iowa Give?

Zogby’s first New Hampshire tracking poll with post-Iowa numbers is out. With yesterday’s numbers added to the three-day rolling poll, Obama gained two pecentage points and Hillary stayed steady, suggesting perhaps that Hillary is holding her own but that Obama is picking up supporters from the second tier and now out of it candidates. She still holds a four point lead, with Edwards pretty far back in third. On the GOP side, McCain loses two percentage points, and clings to a two point lead over Romney. Huckabee gains two but remains a distant third.