Mike Oliver won a tightly contested race for Montgomery County sheriff Thursday, defeating Johnny Ransdell and Dexter Mines. CLARKSVILLE, TN (CLARKSVILLE NOW) – Mike Oliver won a hotly contested race for Montgomery County sheriff Thursday, defeating Johnny Ransdell and Dexter Mines. Oliver told Clarksville Now winning was “an ecstatic feeling.” “The people of Montgomery County have spoken, and we respect … what they decided,” Mines told Clarksville Now. | MORE: Election news, including candidate announcementsFrom the left, Dexter Mines, Mike Oliver, and Johnny Ransdell.