Voters fill out their ballots Nov. 4 in Detroit. (AP Photo/Paul Sancya, file)

If history is a guide, Republicans stand a good chance of losing control of the House of Representatives in 2026. They have just a slim majority in the chamber, and the incumbent party usually gives up seats in midterm elections.

President Donald Trump, whose loss of the House halfway through his first term led to two impeachments, is trying to keep history from repeating — and doing so in ways his opponents say are intended to manipulate next year’s election landscape.

He has rallied his party to remake congressional maps across the country to create more conservative-leaning House seats, an effort that could end up backfiring on him. He’s directed his administration to target Democratic politicians, activists and donors. And, Democrats worry, he’s flexing his muscles to intervene in the midterms like no administration ever has.

Democrats and other critics point to how Trump has sent the military into Democratic cities over the objections of Democratic mayors and governors. They note that he’s pushed the Department of Homeland Security to be so aggressive that at one point its agents handcuffed a Democratic U.S. senator. And some warn that a Republican-controlled Congress could fail to seat winning candidates if Democrats reclaim the House majority, recalling Trump’s efforts to stay in power even after voters rejected him in 2020, leading to the violent attack by his supporters on the U.S. Capitol.

Regarding potential military deployments, Ken Martin, chairman of the Democratic National Committee, told The Associated Press: “What he is going to do is send those troops there, and keep them there all the way through the next election, because guess what? If people are afraid of leaving their house, they’re probably not going to leave their house to go vote on Election Day. That’s how he stays in power.”

Military to the polls, or fearmongering?

Democrats sounded similar alarms just before November’s elections, and yet there were no significant incidents. California Gov. Gavin Newsom, a frequent Trump antagonist who also warns about a federal crackdown on voting in 2026, predicted that masked immigration agents would show up at the polls in his state, where voters were considering a ballot measure to counter Trump’s redistricting push.

There were no such incidents in November, and the measure to redraw California’s congressional lines in response to Trump’s efforts elsewhere won in a landslide.

White House spokeswoman Abigail Jackson said the concerns about the midterms come from Democratic politicians who are “fearmongering to score political points with the radical left flank of the Democrat party that they are courting ahead of their doomed-to-fail presidential campaigns.”

She described their concerns as “baseless conspiracy theories.”

Susie Wiles, Trump’s chief of staff, denied that Trump was planning to use the military to try to suppress votes.

“I say it is categorically false, will not happen. It’s just wrongheaded,” she told Vanity Fair for an interview that was published earlier in December.

DNC litigation director Dan Freeman said he hasn’t seen an indication that Trump will send immigration enforcement agents to polling places during the midterms, but is wary.November’s off-year elections may not be the best indicator of what could lie ahead. They were scattered in a handful of states, and Trump showed only modest interest until late in the fall when his Department of Justice announced it was sending federal monitors to California and New Jersey to observe voting in a handful of counties. It was a bureaucratic step that had no impact on voting, even as it triggered alarm from Democrats.

Under the Constitution, a president has limited tools to intervene in elections, which are run by the states. Congress can help set rules for federal elections, but states administer their own election operations and oversee the counting of ballots.

When Trump tried to singlehandedly revise election rules with a sweeping executive order shortly after returning to office, the courts stepped in and stopped him, citing the lack of a constitutional role for the president. Trump later promised another order, possibly targeting mail ballots and voting machines, but it has yet to materialize.

Still, there’s plenty of ways a president can cause problems, said Rick Hasen, a UCLA law professor.

Trump unsuccessfully pushed Georgia’s top election official to “find” him enough votes to be declared the winner there in 2020 and could try similar tactics in Republican-dominated states in November. Likewise, Hasen said, Trump could spread misinformation to undermine confidence in vote tallies, as he has done routinely ahead of elections.

It’s harder to do that in more lopsided contests, as many in 2025 turned into, Hasen noted.

“Concerns about Trump interfering in 2026 are real; they’re not frivolous,” Hasen said. “They’re also not likely, but these are things people need to be on guard for.”