Republican-led states have redrawn enough congressional districts to significantly improve the GOP's prospects of retaining control of the U.S. House in November's midterm elections, forcing Democrats to outperform their 2024 national vote margin by nearly 5 percentage points to reclaim the majority, Axios reported Sunday.

An analysis of newly enacted congressional maps found Democrats now need to run 4.9 percentage points ahead of former Vice President Kamala Harris' 2024 performance to secure House control, up from 3.1 percentage points before the latest round of redistricting.

The changes could prove pivotal in determining whether President Donald Trump faces a Democratic-controlled House equipped with subpoena power and oversight authority during the final two years of his presidency, or continues governing with Republican control of both chambers of Congress.

Democrats need a net gain of three seats to win the House, assuming current vacancies return to the parties that previously held them, according to Axios.

The redistricting push, led by Republican-controlled legislatures, has effectively added nearly 2 percentage points to the GOP's advantage in the national House vote, according to an analysis of district-level election data.

Trump helped launch the latest redistricting battle by encouraging Texas Republicans to redraw congressional boundaries ahead of schedule. The effort expanded into a broader national campaign aimed at strengthening GOP control of the House.

The campaign gained momentum after the U.S. Supreme Court's April ruling in Louisiana v. Callais, which legal analysts say strengthened states' ability to defend maps drawn with partisan objectives against challenges alleging the dilution of Black voting power.

Following the decision, lawmakers in Louisiana, Alabama and Tennessee pursued maps affecting districts where Black voters had previously elected their preferred candidates. Florida had already implemented similar changes.

Democrats sought to counter Republican gains through redistricting efforts in California and Virginia. However, Virginia's revised congressional map was later overturned by the state's highest court, limiting Democrats' ability to offset Republican advantages elsewhere.

Under the new maps, Harris' 2024 electoral coalition would have carried 200 House districts, down from 205 before redistricting. Democrats need to control 218 seats to win a House majority.

Trump defeated Harris nationally by 1.5 percentage points in 2024. Analysts estimate Democrats would have needed a national advantage of roughly 3.4 percentage points to carry a majority of congressional districts under the previous map configuration.

Across the 10 states that adopted new congressional maps, Democrats held 80 seats following the 2024 election compared with Republicans' 101. To maintain those seats under the revised boundaries, Democrats would need to outperform Harris' margin by more than 10 percentage points.

But Nicholas Stephanopoulos, noting that earlier Republican gerrymanders created a larger structural advantage with fewer Democrat countermeasures, said, "This is not remotely as bad as the post-2010 maps."

The redrawn districts could also reduce the number of competitive House seats and place additional pressure on moderate lawmakers.

Among Democrats representing districts won by Trump in 2024, four now face more Republican-leaning electorates.

Despite the Republican advantage built into the new maps, analysts note that Democrats could still regain the House if current polling trends persist. Recent national surveys show Democrats holding a notable lead on the generic congressional ballot.

Still, experts warn the long-term implications could extend beyond this year, with Stephanopoulos arguing that the greater challenge may come in 2028, when a narrowly divided electorate could allow Republicans to retain House control even if Democrats win the national popular vote for congressional candidates.

While factors such as candidate quality, fundraising, turnout, and national political conditions will continue to shape individual races, the latest round of redistricting gives Republicans a measurable structural advantage heading into the next two election cycles.