Mitt would love a brokered convention. The GOP-e working with Rick would seal the deal for Mitt.
At this point, the best path for Sarah that would advance the cause of Liberty is to chose the best time to endorse Newt.
IF that happened, if it was a Romney/Santorum ticket, I'd pass. If it was a Santorum/Romney ticket ... horrible. There'd be expanding socially-directed government via "compassionate" big government "conservatism" at the helm, with four to eight years more waiting in the wings ala Romney. Pretty bad risk.
Santorum without Romney, I'd go for that, though he'd be a place-holder at a time when place holders are getting riskier and riskier. Can we afford another four or eight years of Dubya reincarnated as The Church Lady? Gingrich is risky, but he's the clear choice for pressing on, calculating to advance an overhaul in the name of limited government to rebuild American prosperity and reduce government "severely."
Gingrich is risky. Santorum is riskier. Romney presents no risk -- he is a SURE bet for failure and malaise.