Santorum, is only serving as a spoiler to ensure a Romney nomination, that is all he ever was or will be.
The same Santorum that came out of no where and beat Mitt in Iowa?
I think there is a hole in your theory.
One good thing Santorum did in the last debate was chime in on how false Romney and Ron Paul’s ads have been against him. This will help back up Newts claims of falseness in the ads. Fox has been calling Newt a whiner and a crybaby to marginalize him. Santorum just gave him credibility in his complaints. Sarah Palin and Limbaugh drove it home.