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.

Few Iowa politics watchers doubt that Democrats will gain ground in the state House today–the only question is how much will the Republican majority shrink.

In contrast, the Iowa Senate landscape could shift in either direction. Republicans now hold 29 seats and are unopposed in Senate district 1, where independent Senator David Johnson is retiring. They are also outspending several Democratic incumbents in districts Donald Trump carried in the last presidential election. Democrats currently hold 20 Senate seats, but they could add to their ranks today, despite a difficult map and a couple of bad breaks over the summer.

Here’s how the key races look going into election day, based on voter registration totals, recent voting history, absentee ballot numbers, and where Democratic or Republican leaders have made large expenditures.

As was the case two years ago, Democratic candidates are at a financial disadvantage in almost all of the Iowa Senate districts both parties are targeting.

The disparity adds another challenge to a party already facing a difficult path to gaining ground in the upper chamber. Republicans currently hold 29 of the 50 Senate seats and are guaranteed to pick up the district independent Senator David Johnson is vacating.

Republicans are all but guaranteed to maintain control of the Iowa Senate after November and could expand their majority, now at 29 out of 50 seats. However, Democrats have a chance to pick up a few districts as they work toward winning back the chamber in 2020.

More Iowa women are running for office in 2018 than ever before, which could lead to record numbers of female state representatives and senators next year.

However, in other meaningful ways, Iowa’s legislature could become less diverse after the November election.

Many Iowa Democrats expect to have the wind at their backs for the 2018 elections, due to surging progressive activism, an unpopular Republican president, and backlash against GOP lawmakers who used their power this year to take rights away from hundreds of thousands of workers, lower wages for tens of thousands more, and undermine protections for those who suffer workplace injuries.

It’s too early to predict the political climate next fall, but Democrats need to hope for favorable external conditions as well as strong recruits and well-run campaigns. New calculations of last year’s presidential election results by state legislative district point to a very steep climb back to 51 seats in the Iowa House and 26 seats in the Senate. This post will survey the terrain in the upper chamber.