 That year, a complaint was filed with the Federal Election Commission against Daines by the Montana Democratic Party, alleging that a radio ad he had run on behalf of a pro-life organization called Common Sense Issues (CSI) was illegal campaign activity.The complaint was later dismissed as Daines had not at that time filed as a candidate for any federal office.When U.S. Representative Denny Rehberg announced his intention to challenge Tester, Daines dropped out of the Senate race and announced his candidacy for the open House seat vacated by Rehberg.