Illinois and Ohio primaries 2024: Trump-backed Senate candidate prevails in Ohio primary

538 tracked key House and Senate races, including a California special election.

November’s presidential matchup may be set, but Democrats and Republicans still need to decide who will run in hundreds of downballot races (e.g., for Senate and House) this fall. A batch of these contests were decided on Tuesday, March 19.

Tuesday was primary day in Ohio and Illinois, and in the biggest contest of the day, Republicans chose former President Donald Trump's endorsee Bernie Moreno as their candidate in Ohio’s U.S. Senate race. It was a good night for other Trump endorsees too, as Derek Merrin prevailed in the GOP primary for Ohio's 9th Congressional District, while incumbent Mike Bost is leading his challenger in Illinois's 12th District, as of early Wednesday morning. Plus, a special election in California could have immediate implications for House Republicans’ razor-thin majority.

538 reporters and contributors broke down the election results as they came in with live updates, analysis and commentary. Read our full live blog below.


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Polls have now closed in California

Polls are now closed in the Golden State, where a special election is taking place to fill the seat of former House Speaker Kevin McCarthy for the remainder of his term. State Assemblymember Vince Fong led in the regular top-two primary two weeks ago, and is favored to ultimately win this race as well. But results in California usually take quite a while to fully come in since a large proportion of voters vote by mail. And it might not end with today's contest either: If no candidate receives more than 50 percent of the vote today, the top two vote-getters will advance to a special general election in May.

—Cooper Burton, 538


Republicans put their faith in another rich guy

Moreno’s nomination in Ohio continues a trend of Republicans entrusting their Senate hopes to a coterie of very wealthy men (and one woman, Nella Domenici in New Mexico). In almost every single competitive Senate race, the likely Republican nominee is a politically inexperienced but very wealthy man, each of whom is self-funding to some degree. While Moreno isn’t as wealthy as Tim Sheehy in Montana, Eric Hovde in Wisconsin or Dave McCormick in Pennsylvania, he certainly fits the mold. And if Republicans come up short in their efforts to flip the chamber this fall, I think there will be a lot of focus on how the party eschewed candidates with experience winning races in favor of neophytes, especially when Democrats have such strong incumbents.

Jacob Rubashkin, Inside Elections


Checking in on anti-abortion Republican candidates

Of the 29 anti-abortion Republican candidates we're tracking, 15 have been projected to win per ABC News, including 6 incumbents. Twelve challengers are projected to lose their races (though, of course, many were running in the same contests, like the crowded Ohio 2nd District race). In the only race on this list that's not yet projected, Illinois's 12th District, incumbent Mike Bost is leading Darren Bailey — both are on the list. With abortion shaping up to be an important issue in the fall, these candidates have all made pro-life statements without saying abortion should be left to the states. That could signal their willingness to support a national abortion ban, as some Republican and national anti-abortion groups are advocating for.

—Monica Potts, 538


Rulli projected to win

In Ohio’s 6th District, Michael Rulli is projected to defeat Reggie Stoltzfus in the Republican primary, according to ABC News. Rulli currently leads by about 9 percentage points in the regularly scheduled primary and 8 points in the special election primary to succeed Rep. Bill Johnson, with over 80 percent of the expected vote reporting in each. Because the district is solidly Republican, Rulli will likely be the next member of Congress. A special election in a few months will send him to D.C., where he’ll fill out the remainder of Johnson’s term.

—Jacob Rubashkin, Inside Elections


Chicagoans are not happy with Mayor Johnson

Chicagoans are voting today on a ballot measure pushed by progressives that would institute a real estate transfer tax to fund programs addressing homelessness. Today's outcome could tell us something about the strength of Chicago's progressive movement … and its unpopular progressive mayor, who's made it a policy priority.

According to publicly available polling, while Chicagoans may have started out feeling good about Mayor Brandon Johnson, their opinion quickly soured. According to Chicago-based Victory Research, Johnson's approval when he first took office in May was at 63 percent. Five months later, in October, Echelon Insights/Illinois Policy Institute found his approval to be just 28 percent, with 50 percent of voters disapproving of his job performance. By January, Tulchin Research/Stand for Children registered an approval rating of just 21 percent, with 70 percent saying his performance was "only fair" or "poor," while Echelon Insights/Illinois Policy Institute marked his approval at 29 percent and disapproval at 57 percent.

The January Echelon Insights survey also asked respondents if they approved of Johnson's handling of various issues facing the city. The mayor received the lowest ratings on "housing and homelessness" (20 percent approve, 68 percent disapprove), "management of immigrants transported to the city" (23 percent approve, 69 percent disapprove), and "crime and public safety" (24 percent approve, 66 percent disapprove).

—Mary Radcliffe, 538