[citation needed] In 2016, Mosley and incumbent Regina Cobb defeated Sam Medrano and Jennifer Jones in the Republican primary for District 5 of the Arizona House of Representatives.

Mosley and Cobb went on to defeat Democrat Beth Weisser and Leo Biasiucci of the Green Party in the general election.

He told the police officer that because of his "immunity as a government official" he should be let go, and bragged about speeding in the past at up to 140 miles per hour (230 km/h).

[5] Doug Ducey (R), the governor of Arizona, called for an end to legislative immunity based on Mosley's behavior.

[6] In August 2018, Mosley and Cobb were challenged in the Republican primary by Leo Biasiucci, a businessman who ran as a Green Party candidate in 2012, and Jennifer Jones-Esposito, first vice chair of the La Paz County Republican Committee.