Iowa Senate winner? (2028)
In 2028
$1.3K Vol.Closes Nov 7, 2029
Republican party$356.8 Vol.61%
Democratic party$941.3 Vol.36%
In 2028
The 2028 U.S. Senate election in Iowa will determine whether incumbent eight-term Republican Chuck Grassley retains his seat or if a Democrat replaces him when his term ends in January 2029.
Current incumbent Chuck Grassley (R) has filed paperwork to run for re-election, while the Democratic Party has no confirmed primary candidate as of early 2026.
Wikipediaintegrityindex.usGrassley won his last election in 2022 with 56.0% of the vote and has served in the Senate since 1981, making him one of the longest-serving members in history.
Wikipediasenatemajority.comA Republican victory maintains Iowa's status as a fully Republican U.S. Senate representation, while a Democratic win would flip one of the most conservative states' seats to the opposition party.
Note: The market resolves to "Yes" if a Republican is sworn in for the term beginning in 2029, which depends entirely on the outcome of the November 7, 2028 general election.
State Senator Claire Celsi died, leaving a vacancy in the Iowa Senate District that prompted a special election in December 2024.
Yahoo NewsRepublicans selected Lucas Loftin as their nominee to fill Celsi's Iowa Senate seat in a special election.
Yahoo NewsJoni Ernst announced she would not seek a third term for the U.S. Senate, opening Iowa's 2026 U.S. Senate seat for the first time in twelve years.
desmoinesregister.comIowa Republican and Democratic primary elections will be held to select nominees for the general election.
integrityindex.usThe general election for the U.S. Senate in Iowa will take place, determining the winner for the 2029–2035 term.
BallotpediaAI-generated briefing. AI can make mistakes. This is not financial advice.
Chuck Grassley has filed official paperwork to run for re-election in 2028, signaling his intent to secure another term despite his age.
WikipediaGrassley won the 2022 election with 56.0% of the vote in a state that consistently favors Republican candidates, demonstrating strong historical support.
WikipediaThe Democratic Party currently has no candidates running in the 2028 primary, leaving Grassley without an immediate intra-party challenger and potentially facing a weaker opposition field.
integrityindex.usAI-generated briefing. AI can make mistakes. This is not financial advice.
Grassley is 92 years old as of 2026, raising concerns about his ability to serve another six-year term and potentially energizing Democratic voters to seek a younger candidate.
WikipediaIowa has experienced rising Democratic activity in recent midterm cycles, including the competitive 2026 U.S. Senate race against Joni Ernst's successor, which may signal a shifting political landscape.
WikipediaLong-serving incumbents often face heightened scrutiny over stagnation, and Grassley's "intent unknown" status in some early 2028 projections suggests uncertainty about his campaign viability.
WikipediaAI-generated briefing. AI can make mistakes. This is not financial advice.