Colorado businessman Joe O’Dea has defeated state representative Ron Hanks in Colorado’s Republican U.S. Senate primary, the Associated Press projects.

State Democrats spent $4 million to meddle in the primary election. They ran ads attempting to bolster Hanks, whom they viewed as a candidate who would be easier to defeat in the general election in November.

The ads lauded Hanks, who marched to the Capitol on January 6, as a true conservative. They questioned whether O’Dea, who supports abortion in some cases, is a real Republican.

O’Dea, who is the founder of a successful construction company, will face off against incumbent Senator Michael Bennett, who is running for a third term, in the general election in November.