The Bush model is probably to win NH and then FL and either be the front runner, or one of two...then spend in the next few states to oblivion to destroy their top opponent. If I remember, Super Tuesday is shortly after FL, which is a media battle. Hopefully Walker can catch him in NH (or another good options rises - Cruz, etc). Obviously still very early for these polls to mean much, but his big lead there is telling of the strategy.
Bush is GOP suicide. I will personally vote for Hillary if Jeb is the nominee. I would rather see it crash than once more be put into the hands of milquetoast moderates.