By the numbers ...

In 1992 Gallup started a new poll measuring the ideological breakdown, by percentage, of Americans. You can see the latest, as of January 2012, here (Im afraid I can't get the hyperlink to work posting via the mobile, apologies, just copy & paste this into your browser): gallup.com/poll/152021/conservatives-remain-largest-ideological-group.aspx

As the long web address eludes to, conservatives make up the largest group. Those that consider themselves conservative or very conservative make up 40% (& have for some years). Liberal or very liberal has held steady at 21%. The "moderates" are 35%. My strategy, and no one is asking, is simple. Conservatives, and moderates that may vote GOP, do not gravitate towards middle of the road Republicans. "Independents", "undecided", call them what you will, you dont capture their attention by half measure or half hearted gestures towards conservatism. We've tried this: Ford, G.H. Bush (second term run w/no Reagan coat tails), Dole, McCain. When we run moderates we get shalacked. When we run an unapologetic conservative, we win. You dont appeal to the undecided by being undecided yourself. You must offer a bold, clear contrast. In doing so you lock down the 40% & give the undecided in the 35% a clear reason to vote for you rather than simply against the other guy.

I believe Santorum could crush Obama precisely because he would offer the starkest, unapologetic, contrast.