By Jim Ellis — Friday, June 6, 2025
Senate
Iowa Sen. Joni Ernst (R) / Photo by Sage Naumann
Iowa state Rep. J.D. Scholten (D-Sioux City), who failed in his 2018 congressional race against then-Rep. Steve King (R), and again in the 2020 open seat campaign opposite current Rep. Randy Feenstra (R-Hull/Sioux City), announced that he will challenge Sen. Ernst next year. Scholten becomes the first sitting Democratic office holder to enter the Senate race.
In an interview with a Des Moines Register newspaper reporter, Scholten explained his motivation for quickly deciding to run after hearing about Sen. Ernst’s comments. In the interview, Scholten said, “… and just sitting there, contemplating life like you do at a funeral, I just thought I need to do this,” he said. “And so then when she doubled down on Saturday with her, I felt, very disrespectful comments, I was like, OK, game on.”
Sen. Ernst was first elected in 2014 with a 51-43 percent open seat victory over then-Rep. Bruce Braley (D) in the battle to replace retiring Sen. Tom Harkin (D). Six years later, she was re-elected with a 51-44 percent victory over Iowa real estate company executive Theresa Greenfield (D) in a campaign where the Senator was outspent by a 2:1 ratio. The aggregate expenditure level between the two candidate committees almost reached $84 million.
In each of those elections, the Democratic candidate over-polled and led early. In the 2014 Senate contest between Ernst and Braley, the Republican state Senator and the Democratic House member were trading the polling lead through most of the race. The contest began to gel for Ernst in October, when she ran ahead of Braley in 12 of 14 polls with four ties.
Though the pollsters were correctly forecasting an Ernst win, they badly missed on the margin as her victory spread was 8.3 percentage points as opposed to an average point lead of just 2.3, according to the Real Clear Politics polling archives.
In the 2020 Senate race, we saw a different pattern yet with a similar conclusion. From September through mid-October, Greenfield held a consistent polling lead. Sen. Ernst began to rebound around Oct. 20 and saw the polling edge begin to flip between the two candidates with the incumbent clinging to a small advantage. In the end, Sen. Ernst was re-elected with a 6.6 percent margin, again well beyond what most pollsters forecast.
Throughout President Donald Trump’s elections the discussed familiar Iowa polling pattern was also present as far back as the 2016 election cycle. Trump and Hillary Clinton were going back and forth in polling for most of the election. In November, Trump began to pull away but averaged only a three-point lead. On election night, he recorded a Hawkeye State victory margin of just under 10 percentage points.
The 2020 polls again produced this repetitive pattern. Ballot test results were seesawing through most of the cycle with Trump forging ahead of Joe Biden at the end with a small average (2.0 percent, in this case), yet would win by 8.2 points when the actual ballots were counted.
In 2024, the state was being polled less possibly because the previous patterns would again likely yield to a strong Republican push at the end that would nullify early polling results. As with every major Iowa election since 2014, the Republican candidate was underestimated. Trump’s 2024 positive Iowa polling average was 4.3 points, again according to the Real Clear Politics polling archives, yet his victory margin broke the 13-point plateau.
Expect a similar pattern to develop for the current election in that polling will likely show this 2026 Senatorial contest to be relatively close through most of the election cycle. In the closing days, it is probable that Sen. Ernst will pull away and win with a larger vote margin than the polling average will suggest.