PIERRE, S.D. (AP) — A trade group says it will spend $69,000 on radio and TV ads in support of U.S. Sen. Mike Rounds and his re-election.

The announcement by the American Chemistry Council comes a week after state Rep. Scyller Borglum launched a challenge to Rounds in the June 2020 Republican primary election.

Rounds won election to the Senate in 2014 after serving two terms as governor.

The Rapid City Journal reports ACC President and CEO Cal Dooley calls Rounds a leader on taxes who has helped ease the burden on middle class families and small businesses in South Dakota. The ACC will run the ads for two weeks. It represents nearly 200 companies, including DuPont and ExxonMobil.

Borglum is an engineer who was elected to the state House last year.