The Iowa Senate reconvened on January 12 with a different look: a new majority leader (Mike Klimesh) and a changed balance of power: 33 Republicans and seventeen Democrats, down from a 34-16 GOP majority for most of the 2025 session.

Seven senators (four Republicans, three Democrats) were elected to the chamber for the first time in 2024, and three more won their seats in special elections during 2025.

Fourteen senators are women (eight Democrats and six Republicans)—that’s one more woman than last year, since Democrat Catelin Drey won the race to succeed the late Rocky De Witt in Senate district 1, and Renee Hardman won the race to succeed the late Claire Celsi in Senate district 16. The high point for women’s representation in the Iowa Senate was in 2023 and 2024, when the chamber had 35 men and fifteen women.

Hardman is the first Black woman to serve in the Iowa Senate and only the third African American ever elected to the chamber. Democrat Izaah Knox is also Black. The other 48 senators are white. No Latino has ever served in the chamber, and Iowa’s only Asian-American senator was Swati Dandekar, who resigned in 2011.

In 2023, Democrat Janice Weiner became the first Jewish person to serve in the Iowa Senate since Ralph Rosenberg left the legislature after 1994. She became the first Jewish person to lead an Iowa legislative caucus when her peers elected her minority leader in November 2024.

Democrat Liz Bennett is the only out LGBTQ member of the Iowa Senate.

I enclose below details on the majority and minority leadership teams, along with all chairs, vice chairs, and members of Iowa Senate committees. Where relevant, I’ve mentioned changes since last year’s legislative session. Although there hasn’t been as much turnover as the Iowa House saw during the interim, Klimesh did make quite a few changes in the committees compared to last year. He took all committee assignments away from one Republican (Doug Campbell) and took certain positions away from Kevin Alons, Mark Lofgren, Sandy Salmon, and Dave Sires.

Some non-political trivia: the 50 Iowa senators include four men named Mike (three Republicans and a Democrat), two Toms (a Democrat and a Republican), a Dave and a David (both Republicans), and two men each named Jeff, Mark, and Dan (all Republicans).

UPDATE: Drey won the election by 4,208 votes to 3,411 (55.2 percent to 44.7 percent), according to unofficial results. A forthcoming post will analyze the precinct level results. Original post follows.

The stakes are unusually high for the August 26 special election in Iowa Senate district 1. If Republican Christopher Prosch wins the race to succeed former State Senator Rocky De Witt, who died of cancer in June, the GOP will hold 34 of the 50 Iowa Senate seats for next year’s legislative session. That would give Republicans the two-thirds majority they need to confirm Governor Kim Reynolds’ nominees with no Democratic support.

If Democrat Catelin Drey flips the seat, the Republican majority in the chamber will shrink to 33-17, allowing Senate Democrats to block some of the governor’s worst appointees.

Equally important, a win in red-trending Woodbury County could help Democrats recruit more challengers for the 2026 legislative races, and could inspire more progressives to run in this November’s nonpartisan elections for city offices and school boards.

Although Donald Trump comfortably carried Senate district 1 in the 2024 presidential election, Democrats have grounds to be optimistic going into Tuesday’s election.

They say anything can happen in a low-turnout special election. And on January 28, voters in Iowa Senate district 35 elected Democrat Mike Zimmer to represent them through the end of 2026. Zimmer defeated Republican nominee Katie Whittington by 4,812 votes to 4,473 (51.7 percent to 48.1 percent), according to unofficial results.

Most Iowa political observers expected Republicans to hold the seat easily. Former State Senator Chris Cournoyer was re-elected in this district with about 61 percent of the vote in 2022. (She resigned from the legislature to become Iowa’s lieutenant governor last month.) In the most recent general election, voters living in Senate district 35 preferred Donald Trump to Kamala Harris by a 21-point margin, and preferred GOP incumbent Mariannette Miller-Meeks over Democratic challenger Christina Bohannan by a 9-point margin. The GOP has a voter registration advantage too.

Yet Zimmer performed well in every part of Senate district 35. He carried Clinton County, where most of his constituents live, by 3,411 votes to 3,169 (51.7 percent to 48.0 percent). Trump won that formerly blue county in November with 58.5 percent of the vote to 39.7 percent for Harris.

The Democrat carried the Jackson County precincts by 555 votes to 446 for Whittington (55.4 percent to 44.6 percent). Voters in the same area favored Trump by 60.3 percent to 38.2 percent in November, according to Bleeding Heartland’s analysis of the precinct-level results.

Also impressive: Zimmer nearly matched his opponent in the Scott County portion of the district, gaining 846 votes to 858 for Whittington (49.6 percent to 50.3 percent). Trump’s advantage over Harris in the same precincts: 64.2 percent to 34.1 percent.

How did the Democrat pull it off?

UPDATE: Zimmer won the special election. You can read about how he did it here. Original post follows.

Both major parties have selected their nominees for the January 28 special election to in Iowa Senate district 35. Central DeWitt school board president Mike Zimmer was unopposed at the Democratic Party’s special nominating convention on December 30. Clinton County activist Katie Whittington prevailed in a three-way competition at the GOP special convention on January 4.

Iowa House Republican Tom Determann, who has represented House district 69 (the Clinton area) since 2023, and Clinton County farmer Dennis Campbell also competed for the GOP nomination.

Whittington has never held elective office but has volunteered for various causes locally, including Donald Trump’s presidential campaign. She describes herself as a “health freedom advocate” and has been active with the anti-vaccine organizations Children’s Health Defense and Health Freedom Iowa, for which she has served as vice president.

UPDATE: Zimmer won the special election. You can read about how he did it here. Original post follows.

Central DeWitt School Board president Mike Zimmer announced on December 23 that he will seek the Democratic nomination in Iowa Senate district 35, where voters will choose a successor to Lieutenant Governor Chris Cournoyer on January 28. In a statement enclosed in full below, Zimmer promised to “champion Eastern Iowa’s public schools, working families, and our middle class” by fighting for “stronger public schools, better wages, and opportunities that foster real financial stability.”

According to a guide from the Iowa Secretary of State’s office, candidates have until 5:00 PM on January 14 to file nominating papers with the secretary of state. Before then, Democrats and Republicans will hold nominating conventions, where delegates from the 36 precincts across the Senate district will choose a nominee. Third-party or independent candidates need to collect at least 100 signatures from eligible voters residing in the district, and submit those petitions with their nominating papers.

While others could compete for the Democratic nomination at the special convention, Zimmer’s proven electoral track record would give him an advantage.