Mitt Romney’s campaign, having won the Ames poll and feeling strong in Iowa, are now turning the heavy artillery on New Hampshire in the form of radio ads blasting the “sanctuary” city policies of New York, Newark and San Francisco.

While the ad does not mention his main rival, Rudy Giuliani, by name, it is an obvious attack on the former New York mayor.

The ads come on the heels of Romney and Giuliani exchanging sound bytes over the “sanctuary city” issue last week.

This Giuliani/Romney battle, combined with the recent Clinton/Obama dust-ups are indicative of a race that appears to be consolidating faster than in past races. The first tier horses are starting to jostle with each other, rather than the lower tier horses, making it appear as if they don’t consider the lower tier as challengers in the race.