Sen. Tommy Tuberville‘s (R-AL) former opponent in Alabama’s Republican gubernatorial primary is alleging that the U.S. senator is not, in fact, a qualified Alabama resident.

Ken McFeeters, who lost to Tuberville in the May contest, has launched three separate challenges and a now-dismissed lawsuit over the former Auburn University football coach’s ability to run. Those challenges prompted Tuberville to release his partially redacted income tax returns ahead of an Alabama Republican Party hearing on June 14.