As we reported today, foes of Obamacare are backing almost half of the more than 66,000 ads in U.S. House and Senate races aired through March 9 — more than triple what candidates and allied groups aired during a comparable period four years ago — according to Kantar Media’s CMAG.
More than 30,000 of the ads had an anti-Obamacare message, a 12-fold increase from four years ago. The anti-Obamacare spots accounted for 45 percent of all ads, up from 12 percent during the comparable period leading up to the 2010 midterm elections.
Above, see the top sponsors in this year’s campaigns.
Below, see the top ad sponsors early in the 2010 election season: