While campaign finance is not the only factor in electoral outcomes, successful fundraising can provide a candidate with advantages during a campaign. Fundraising can also indicate party momentum.

In Arizona, state-level candidates have spent $100 million between Jan. 1, 2021, and Oct. 22, 2022. Democratic candidates have spent $29.8 million and Republican candidates have spent $69.8 million. 

This article details the five most and least expensive contested general elections in the State Senate.