Twenty-eight of the 51 Arizona state legislators running for re-election this year—nine Democrats and 17 Republicans—face contested primaries. That equals 55% of incumbents seeking re-election, the highest rate since 2014. The remaining 45% of incumbents are not facing primary challengers.
Twenty-eight incumbents is, by itself, the largest number of incumbents in contested primaries since 2014. But it is also similar to recent cycles. The rate of incumbents in contested primaries is higher this year than 2018 and 2020 because fewer incumbents are seeking re-election.
