When ads attack: number of negative political ads on the rise TweetShareGoogle+Email John Geer is authoring a book on political attack ads. By Kevin Willis Listen Listening... / Bowling Green, Ky – With both chambers of Congress up for grabs, the number of negative political ads is on the rise. Vanderbilt Political Science professor John Geer has researched the impact of attack ads. He spoke with Kevin Willis. TweetShareGoogle+EmailView the discussion thread.