When Mitt Romney was asked about whether he had a philosophical core in the CNBC debate last week, he said "I think people understand that I'm a man of steadiness and constancy." Pundit Mark Shields explains that this was a shot at Newt Gingrich and his unsteady personal life.

That was directed right at Newt Gingrich... who has been three times married... serially monogomous... that was a clear, clear shot...