It’s a good question, and one that hasn’t been answered. Go read Robinson’s article.
Here are a few snippets:
In the establishment’s best-case scenario, the party is left with Mitt Romney, a candidate whose core message, as far as I can tell, seems to be: “Yes, I made a ton of money. You got a problem with that?”
It is remarkable that the well-orchestrated blitzkrieg to save Florida for Romney was designed solely to raise doubts about Gingrich’s character and electability — rather than convince voters that Romney, on the merits, should be president. It makes you wonder whether the GOP luminaries supporting this guy really believe in him.
[…]
Gingrich, Rick Santorum and Ron Paul have all laid out bold visions — more properly, hallucinations — of where they would take the country. But where is Romney’s shining city on a hill? What’s his “compassionate conservatism,” his “hope and change”? What is it that Mitt Romney, deep in his heart or down in his gut, really believes in?
His closing sentences sums everything up: “No matter how much he claims otherwise, the fact is that few people are envious of Romney’s business success. We just want to know if that’s all he has to offer.”
Mitt Romney and surrogates are running a campaign whose message consists of “Here’s why you shouldn’t vote for Newt.” I imagine his campaign against Obama will be more of the same. What’s missing is why you should vote for Romney.
He’s really going to have to answer that question.