Ohio is heading toward a high-profile, high-spending Senate contest this November, after Democratic former senator Sherrod Brown and Republican incumbent Jon Husted secured their parties' nominations in Tuesday's primary elections. The race will determine who fills the remainder of the six-year Senate term won in 2022 by JD Vance, who vacated the seat upon becoming vice-president. Husted, appointed by Ohio's Republican Governor Mike DeWine to serve in Vance's place, ran unopposed in the Republican primary. Brown, a three-term Senate veteran who lost his re-election bid in 2024, defeated a single primary challenger by a wide fundraising margin.
The contest is shaping up to be one of the most expensive Senate races in the country. The main Senate Republican super PAC has announced plans to spend $79 million in Ohio, with Democratic-aligned groups expected to match that figure. Senate Minority Leader Chuck Schumer has identified the seat as one of four priorities in the party's effort to retake control of the chamber — an objective that once seemed unlikely after Donald Trump's 2024 election victory, but appears increasingly plausible as the president's approval ratings have declined.
Ohio, a midwestern state long considered a bellwether of American politics, was a genuine swing state as recently as 2008 and 2012, when Barack Obama carried it in both presidential elections. Since then, it has shifted decisively toward Republicans, backing Trump in all three of his presidential campaigns by growing margins. Democrats are nonetheless hoping that voter dissatisfaction with the Trump administration could tip competitive races in their favour this cycle.
Tuesday's primaries also produced nominees for Ohio's governorship, which is open due to term limits on DeWine. Republicans selected Vivek Ramaswamy, a health-technology entrepreneur who rose to national prominence during his unsuccessful 2024 presidential primary campaign before becoming a prominent Trump ally. Ramaswamy, who loaned his campaign $25 million, will face Democrat Amy Acton, a former state public health director who guided Ohio through the Covid-19 pandemic and ran unopposed. That race is likely to centre heavily on the legacy of pandemic-era restrictions, with Ramaswamy already running ads criticising Acton's record, though DeWine himself has pushed back on some of those claims.
Also notable from Tuesday's results: Republicans in north-west Ohio selected Derek Merrin, a former state legislator who lost to Democratic Congresswoman Marcy Kaptur in 2024 by fewer than 2,400 votes, as their candidate to challenge her again. Kaptur, who represents the Toledo-centred district and is the longest-serving woman in the House of Representatives, is considered one of the most vulnerable Democrats in Congress following redistricting changes that made her constituency more conservative.