Republican Eric Hovde refused Tuesday to concede defeat in the Wisconsin Senate race, casting doubt on the results despite a lack of evidence of any wrongdoing in last week's election.

According to previous reports from the Associated Press, Wisconsin’s hotly contested race for U.S. Senate between Democratic Sen. Tammy Baldwin and Republican Eric Hovde, appeared to be close enough for a recount to be requested.

Wisconsin Republican Eric Hovde refused to concede defeat on Tuesday to Democratic incumbent Tammy Baldwin in their U.S. Senate race, saying he was “deeply concerned” about the election results but that seeking a recount was a “serious” decision and he was still reviewing his options.