The entire article is good, but you will particularly like Goldberg's conclusion:
Mitt Romney is still the sensible choice if you believe these are rough, but generally sensible, times. If, however, you think these are crazy and extraordinary times, then perhaps they call for a crazy, extraordinary — very high-risk, very high-reward — figure like Gingrich.
This helps explain why Newtzilla is so formidable. In order to stop him, you need to explain to very anxious GOP voters that the times don't require him.
Mitt has a shot at making that point. If only Mitt didn't remind us of poor, sincere Bob Dole.