On July 21, Arizona held primaries for the Republican, Democratic, No Labels, Green, and Libertarian Parties. The only contested minor party primary for statewide office was the No Labels Party primary for Governor. Teri Ann Hourihan received 5,077 votes, and her opponent, Hugh Lytle, received 4,039.

The Arizona Clean Elections Commission sponsors debates for gubernatorial candidates. On June 18 it had sponsored a debate between the two No Labels candidates, but Lytle chose not to participate.