In the end, it wasn’t even close.

Democrat Catelin Drey defeated Republican Christopher Prosch by 4,208 votes to 3,411 (55.2 percent to 44.7 percent) in Iowa Senate district 1, covering much of Sioux City and some rural areas in Woodbury County. Donald Trump carried this district by 11 points in the 2024 presidential election, winning more votes than Kamala Harris in fifteen of the 22 precincts. Yet Drey carried nineteen of the 22 precincts and improved on Harris’ vote share in every precinct.

It was the second Iowa Senate seat Democrats flipped in 2025, and the fourth straight special election in Iowa where the Democratic nominee overperformed by more than 20 points, compared to the November 2024 presidential results. Drey’s win also means Republicans will no longer have a two-thirds supermajority in the Iowa Senate when the legislature convenes in January.

While not every tactic from a special election campaign translates into a higher-turnout midterm environment, Democrats can learn a lot from what Drey and her team did right as they prepare for 2026 races for down-ballot offices. In addition, these lessons could help many progressives running in Iowa’s nonpartisan city and school board elections this November.

Senator-elect Drey and Iowa Senate Minority Leader Janice Weiner joined Iowa Starting Line’s Zachary Oren Smith and me on August 27 to discuss how they overcame the odds. You can watch our whole conversation here.

I also sought insight from Julie Stauch, who has worked on many Democratic campaigns and helped guide a successful 2023 special election campaign for Warren County auditor.

At this time four years ago, Barack Obama’s campaign had about 30 field offices up and running in Iowa, compared to six offices for Republican presidential candidate John McCain.

Obama’s campaign has had eight Iowa field offices open this summer and is rolling out another 26 offices around Iowa this weekend. So far, Mitt Romney’s campaign has ten Iowa field offices, in addition to the unified Republican headquarters in Urbandale.

After the jump, I compare the field office locations for each presidential campaign, grouped by Iowa Congressional district. Where relevant, I’ve also noted competitive Iowa House and Senate districts near the Obama and Romney field offices, although I doubt either presidential campaign will do much for down-ticket Democratic or Republican candidates.