Kentucky's U.S. Senate election could be a close race, but the battle for the airwaves has already been won.
Republicans have outspent Democrats on TV by more than $8.4 million, according to data compiled by the Center for Public Integrity. That means Kentucky voters have seen roughly 13,600 more ads for Sen. Mitch McConnell than they have for Democrat Alison Lundergan Grimes.
But Grimes and her allies have not been absent from the airwaves, airing 30,700 ads over the course of the campaign.
More than half of the ads aired by or on behalf of the two campaigns have been negative, according to an analysis by the Wesleyan Media Project, while just 17 percent have been positive.
The election is Tuesday.