Can Rick Santorum Go the Distance?

Polls by Gallup, Pew and the New York Times show Rick Santorum virtually tied with Mitt Romney among Republican voters. He has big leads among Tea Partiers and evangelicals in the Midwest, with Romney doing better in the West and the Northeast. As the race moves to Michigan -- a victim of the recession – and Arizona later this month, followed closely by ten states on Super Tuesday (March 6), can Santorum shift from the cultural wars and talk the blue-collar talk about the economy? Can Romney overcome his famous advice to "let Detroit go bankrupt" and swamp Santorum with negative ads? Does Santorum have the resources to maintain his position?