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.

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.

UPDATE: On December 23, Governor Kim Reynolds scheduled the special election for Tuesday, January 28. Original post follows.

Voters in Iowa Senate district 35 will soon elect a new senator, now that Chris Cournoyer has resigned from that role to become Iowa’s lieutenant governor.

Under state law, when a vacancy in the Iowa House or Senate arises within 45 days of the next legislative session convening, “the governor shall order such special election at the earliest practical time, giving at least eighteen days’ notice.” Governor Kim Reynolds’ spokesperson Mason Mauro said on December 16 he could not answer questions about the timing of the special election. But it’s likely to happen sometime in January. The winner will serve out the remainder of Cournoyer’s term, which runs through 2026.

Republicans will be heavily favored to hold the seat, which would give them a 35-15 majority in the chamber.