Heated Battle for U.S. Senate Draws Deluge of Outside Group Ads, Most Are Dark Money

Groups Responsible for Majority of GOP Ads;
Huge Republican Ad Advantage in House Races Disappears in August

(MIDDLETOWN, CT) September 4, 2014 – With prognosticators giving even odds that Republicans will take over the U.S. Senate after this November’s elections, outside groups are taking notice. Almost 52 percent of ads aired in favor of Republican candidates have been sponsored by interest groups, and that figure is 40 percent on the Democratic side. Groups have spent an estimated $97 million on advertising in Senate races this election cycle, which is up from the estimated $78 million spent to this point in the 2012 election cycle. Table 1 provides total ad counts by sponsor in Senate races in the current and the 2012 election cycles, including all ads aired through August 30 in each cycle.

Read more