As the four GOP candidates have campaigned, their similarities and differences have become apparent.
Jeff Fitzgerald, a Wisconsin State Assembly Speaker isn't new to the ring of politics and believes hes best fit to work on a growing unemployment rate.
Fitzgerald elaborated, "We got to be more competitive and and go after the tax climate here in the state, and go after regulatory reform as well. We must also attack that on a national level at the same time."
The second candidate in the race is Eric Hovde. He's a business man and banking executive from Madison who is running for his first time for a political office. He believes that his experience in business and his distance from Washington will give him a different advantage than the other candidates.
Eric Hovde explained,"I have a private sector approach. I understand financial markets because so many of our problems come from that and I believe that I can fix what's happening here."
Mark Neumann is a former US Representative, and also a businessman. his conservative record has earned him an endorsement from the Tea Party movement. Neumann says, "I think its the experience that I bring to this seat, and the fact that we have a plan to balance the budget and repeal Obama Care."
The fourth and final candidate looking to fill the empty Senate seat is former governor Tommy Thompson. His opponents have attacked him for having a record that's not conservative enough, especially on heath care reform. The 42nd former governor of Wisconsin believes that the American dream starts with businesses and giving people opportunities to enhance the economy.
Thompson continues, "Give Every American an opportunity for the foreseeable future to invest $100,000 tax free, in both businesses and stocks; you'll see the economy turn around quickly."
The primary to see who wins the primary is August 14th. The winner will face the Democratic nominee Tammy Baldwin.