This post has been updated with unofficial results from the November 5 election, as well as the final pre-election campaign finance disclosures and absentee ballot totals as of November 2. Original post follows.

Republicans currently hold 34 Iowa Senate seats—the largest GOP contingent in that chamber since 1973. Democrats are not realistically contending to regain the Senate majority in November. So why pay any attention to these legislative races?

Although the most competitive state Senate races won’t determine control of the chamber, they could reveal a lot about each party’s strengths with certain kinds of voters. A good night for Republicans would indicate that the Trump-era realignment has moved further into Iowa’s former blue regions. A good night for Democrats could pull the GOP below the two-thirds threshold, which has allowed Senate Republicans to confirm all of Governor Kim Reynolds’ nominees without any support from the minority party.

This post highlights four state Senate districts at most risk of flipping, and another seven districts where even without a big investment by Democrats or Republicans, the results could shed light on broader political trends in Iowa. A forthcoming article will cover state House races to watch in 2024.

Editor’s note: This analysis has been updated with unofficial results from all the races. Original post follows.

The major parties have spent hundreds of thousands of dollars on the most competitive 2022 Iowa House and Senate races.

This post highlights seven state Senate districts where one or both parties have spent large sums, and another seven where even without a big investment by Democrats or Republicans, the results could shed light on political trends.

All voter registration totals listed below come from the Iowa Secretary of State’s office, as reported on November 1. All absentee ballot figures come from the Secretary of State’s office, as reported on November 7. All past election results come from the map Josh Hughes created in Dave’s Redistricting App.

All figures for in-kind spending by the Iowa Democratic Party or Republican Party of Iowa come from filings with the Iowa Ethics and Campaign Disclosure Board. I focus on in-kind spending, because candidates in battleground Iowa legislative races typically give most of their funds to the state party. The party then covers the bulk of the large expenditures for direct mail and/or television, radio, and digital advertising.