The Pinal County Clerk of the Superior Court may have stamped out her GOP competitor late Tuesday.
Early voting indicated Republican incumbent Amanda Stanford holds a healthy lead (56.56 percent) ahead of primary opponent Scott McKee (43.23 percent).
Currently, 33 percent of precincts are reporting.
The Republican winner was expected to have no competition in the upcoming general election.
More than 1,600 votes have been cast for Democratic write-ins. Votes were also tabulated for a Republican write-in, with a slim tally of 34 votes.