Mid-decade redistricting efforts yield mixed results as Democrats gain House control
Republicans' mid-cycle attempts to redraw congressional maps in several states largely failed, with Democrats securing a majority in the House and many states ending up as so-called “dummymanders.”
Republicans launched an unprecedented mid-decade redistricting push in a number of states, aiming to preserve their majority in the U.S. House. The strategy was largely rebuffed on Election Day, as Democrats secured control of the chamber, with estimates ranging from 251 to 268 seats.
In Texas, Republicans entered the vote with 24 seats and sought to add five more by emphasizing gains in South Texas. After the election, they held 24 seats while Democrats captured 14, turning the state into a “dummymander.”
Ohio’s GOP-handed commission redrew districts to add two seats, targeting long-time Democratic incumbents Marcy Kaptur and Greg Landsman. Republicans won seven seats, Democrats seven, and a further district is expected to go Democratic, also producing a dummymander outcome.
North Carolina’s Republican-controlled legislature passed a new map despite a Democratic governor, aiming to unseat Rep. Don Davis. With four Democratic wins and several races still undecided, the state could become a dummymander if Democrats prevail in the remaining contests.
In Louisiana, a post-Supreme Court map intended to eliminate a majority-Black district resulted in three Republican and one Democratic victory, leaving one toss-up and a runoff that could shift the balance.
Alabama’s map, also reshaped after the court decision, failed to add seats for Republicans; both Democratic incumbents retained their seats, leaving the state a dummymander.
Tennessee’s redrawn map targeted Nashville’s lone Democratic district. Republicans secured six seats, with two runoffs pending; Democratic wins in either would create a dummymander.
Florida’s GOP-led redistricting, backed by Governor Ron DeSantis, aimed for up to four additional seats. Republicans hold 16 seats, Democrats seven, and five districts remain competitive, meaning a Democratic pickup could produce a dummymander.
Missouri’s new map was blocked by the Supreme Court, leaving 2022 boundaries in place. Democrats flipped a seat, resulting in a 5-3 Republican advantage.
In Indiana, despite pressure from President Trump, the state Senate rejected a map that would have eliminated the two Democratic seats. Democrats retained their two seats and added a third, giving the state a 6-3 split.
South Carolina’s attempt to redraw districts to unseat Rep. Jim Clyburn failed in the Senate, and Clyburn was re-elected; two races remain uncertain.
California’s Democratic governor promoted a ballot measure to add five seats for Democrats, which voters approved. Democrats now hold 42 seats with six more likely Democratic, while Republicans have two seats and two likely Republican, marking a successful gerrymander for Democrats.
In Utah, a 2025 judicial ruling replaced a GOP-favored map with one that created a Democratic-leaning district, leading to a decisive win for Democrat Ben McAdams.
Virginia’s voter-approved ballot measure to favor Democrats was struck down by the state Supreme Court, restoring the 2021 map. Democrats won seven seats, Republicans two, with two contests still undecided.
Maryland’s constitutional requirement for compact districts and a ballot initiative to relax redistricting restraints were noted, though specific election outcomes were not detailed.