Bush is prepared to compete everywhere, his advisers claim. That's the kind of infrastructure that's really hard to beat. There's no other state where he's within 30 points. That's not how you win the nomination. It never works.
Polls can change quickly depending on New Hampshire's results.
Whether it propels them to win is another matter. That presents two problems for McCain. Given his progress to date, a McCain win in New Hampshire would not represent a political earthquake. And even if he gets the traditional bounce, as Buell notes, victory in New Hampshire by an underdog is no guarantee of ultimate success. Bush and McCain face different challenges.