They’re trying to thug Santorum out of the race:
“If Santorum runs a principled campaign and then concedes graciously then he has a big future ahead,” said Steve Schmidt, who managed McCain’s 2008 presidential campaign. “If he runs a character campaign attacking Romney, then Santorum’s future is more limited.”
Essentially, what Schmidt is saying (and many others, as well) is that Santorum can have a lucrative career with tons of Wingnut Welfare if he will just stop attacking Mitt Romney and play nice.
I suppose Santorum might take the hint, but he’s on a moral crusade. He is fighting for your soul, people. Don’t you get it? He doesn’t want no stinking Saturday program on Fox News.