Two very different redistricting stories are unfolding in Indiana and Ohio as voters head to the polls Tuesday, offering a fresh read on former President Donald Trump’s influence and how map changes are reshaping contests.
In Indiana, a high-profile effort last year to redraw legislative maps to create more Republican seats failed. In response, Trump and his allies have moved to oust seven GOP state senators who opposed the plan — an unusual step for a president who seldom backs challengers to sitting members of his own party. Supporters of those primary challenges say they are enforcing accountability for lawmakers who blocked a key party priority. Critics, including some of the targeted senators, argue that national money and interventions undermine state decision-making and the Tenth Amendment by injecting outside influence into state legislative races.
Ohio’s situation is different: courts and legal rules forced new congressional maps after earlier versions were overturned or enacted without bipartisan support. The current map makes only modest boundary changes, and some shifts are not uniformly favorable to Republicans. Those primaries come after a recent U.S. Supreme Court ruling that weakened Section 2 of the Voting Rights Act — a decision that could encourage Republican-led redistricting in some Southern states to dismantle majority-minority districts and could intensify a broader redistricting battle nationwide.
Both states’ contests also reflect bigger national dynamics: Trump’s approval ratings and agenda are helping shape competitiveness in Ohio’s governor and U.S. Senate races, and Democrats see opportunities to pick up seats. What follows are four key things to watch on primary day.
1) Trump’s push against Indiana state senators
Trump’s operation has actively supported primary challengers to Republican state senators who voted against the redistricting plan. Targeted senators say the national intervention threatens states’ rights and distorts local politics; their defenders argue the effort amounts to retribution that undermines independent decision-making at the state level. Backers of the challenges say lawmakers must face consequences for rejecting a major party priority, framing the effort as holding officials accountable to voters and party promises.
2) Uncommonly serious primary fights for two Indiana House seats
Primary challenges to incumbents are usually low-profile and underfunded, but this cycle is different in two Indiana congressional districts. Rep. Jim Baird, who has Trump’s endorsement, faces better-funded primary opposition that includes state Rep. Craig Haggard and substantial interest from outside groups. Conservative outside groups have attacked Baird over votes such as his support for a bipartisan immigration bill, while other organizations have moved money to defend him. On the Democratic side, Rep. André Carson — Indiana’s longest-serving House member — is being pressed by several primary challengers amid calls from some in the party for new leadership.
3) Which Ohio House Democrats draw general election opponents
Ohio’s current House delegation is 10 Republicans and five Democrats. The court-ordered map tweaks could make some districts more favorable to Republicans and others more competitive for Democrats. Reps. Greg Landsman and Marcy Kaptur appear more vulnerable under the new plan, while Rep. Emilia Sykes may face reduced pressure. Kaptur, in Congress since 1983 and the longest-serving woman in House history, narrowly prevailed in 2024 and now faces a crowded Republican field, including some familiar challengers. Landsman’s GOP opposition includes Trump-backed contenders. Republicans view Kaptur’s seat as a prime pickup opportunity.
4) Can Democratic enthusiasm persist through November?
Since Republicans captured a federal trifecta roughly 18 months ago, several elections have swung toward Democrats, often aided by strong turnout in diverse states. Democratic primaries this cycle in many places have shown increased participation, and Ohio Democrats hope that momentum, combined with typical midterm dynamics favoring the party out of power, can flip competitive races in November. Early voting in Ohio has shown a roughly 11% higher use of Democratic primary ballots than Republican ones, according to the state secretary of state.
In Ohio’s governor’s race, former state health director Amy Acton is running unopposed in the Democratic primary. On the Republican side, Vivek Ramaswamy’s endorsement last year largely cleared the GOP field. The Senate primary is uneventful: incumbent Republican Sen. Jon Husted has no primary opposition, and former Democratic Sen. Sherrod Brown faces only a low-funded intraparty foe.
Why these primaries matter
These contests are a snapshot of larger forces reshaping American politics: the nationalization of local races through big-money spending and celebrity endorsements; the legal and political consequences of new maps and court rulings on representation; and whether recent surges in Democratic turnout can be maintained through the midterm elections. Voters’ choices Tuesday will help indicate how those trends might play out in November.