The Chamber of Commerce of the U.S ., using funds contributed by undisclosed corporations and business interests, is pumping over $600,000 into support for a U.S. Senate candidate running against a former company CEO.  

The Chamber of Commerce of the U.S. reported Friday afternoon that it had paid $636,335 on May 28th to Revolution Agency for TV and digital advertisements as independent expenditures supporting Rep. Jack Kingston, R-Ga., in his race for the U.S. Senate. The ads will run from May 28th through June 17th.  

Kingston is running in the July 22nd Republican primary runoff against David Perdue, R-Ga., who received the most votes in the Republican primary election. Perdue is a former CEO of both Reebok and Dollar General Corporation.  

The winner of the runoff will face Michelle Nunn, D-Ga., in the fall general election. The general election will fill the seat of retiring Sen. Saxby Chambliss, R-Ga.  

Update: The Chamber of Commerce also reported spending $500,000 on May 28th for TV and digital ads supporting Joni Ernst, R-Iowa, in next week’s Republican primary. Ernst is running against Mark Jacobs, R-Iowa, a former CEO of Reliant Energy.