The secretary of state is Arizona's top elections official and first in the line of succession to the governor's office.
In each of the last four decades, an Arizona governor has left office early and was succeeded by the secretary of state.
The Republican primary winner faces Democratic State Sen. Katie Hobbs in the November general election.
Watch the livestream of this weekend’s “Sunday Square Off” debate between the two candidates in the Republican primary for secretary of state: incumbent Michele Reagan and political newcomer Steve Gaynor.
You can watch the full “Sunday Square Off” broadcast at 8 a.m. Sunday on 12 News.