Nyhan urges reporters to pay more attention to negative advertising:
[T]he most significant campaign news of the last few days was not the debates over the weekend, or even today’s New Hampshire primary, which Romney should easily win. Rather, it was the report that a super PAC backing Newt Gingrich will air millions of dollars in negative ads against Romney in South Carolina, the site of the next Republican primary after New Hampshire. But while the media hasn’t ignored this development—the news was reported on the front page of Monday’s New York Times, among other places—it hasn’t yet gotten the broad attention it merits.
The Dish 