nal County Sheriff Mark Lamb has submitted his required voter signatures to run for U.S. Senate in Arizona.The 51-year-old lawman faces former TV personality Kari Lake in the July 30 primary election.A San Tan Valley Republican, Lamb said Tuesday he turned in more than 13,000 signatures, almost twice the 7,062 needed to get his name on the ballot. Lamb is free and clear to run for another office because it is the last year in his term as sheriff.