Politico notes the Wesleyan Media Project, which analyzies political ads, finds 70% of all the ads in the presidential race have been negative so far. At the same point in 2008, that total was just 9%
“One reason the campaign has been so negative is the skyrocketing involvement of interest groups, who have increased their activity by 1100 percent over four years ago” said Erika Franklin Fowler, co-director of the Wesleyan Media Project. “But we cannot attribute the negativity solely to outside groups. Even the candidates’ own campaigns have taken a dramatic negative turn.”
The analysis of Kantar Media/CMAG data found that while 75 percent of interest group advertising was positive in 2008, this time around it’s 86 percent negative. And candidate ads went from 91 percent positive in 2008 to 53 percent negative four years later.
The study looked at all presidential advertising on broadcast television and national cable, from Jan. 1, 2001 through April 22 of this year.

