The Texas House of Representatives has approved a sweeping new congressional map that would hand Republicans up to five additional U.S. House seats, locking in a commanding advantage for the GOP and sparking a fresh wave of redistricting warfare across the country.

On Wednesday, the lower chamber voted 88–52 along strict party lines to advance House Bill 4, a Republican-drafted proposal that redraws the state’s political lines in a way designed to cement GOP dominance for the next decade.

The Texas Senate, which passed a similar version of the bill earlier this week, is set to take up the House-passed plan Thursday evening. If the Senate approves without changes, the legislation could be on Abbott’s desk by week’s end.

The move, hailed by conservatives as a “big beautiful win,” comes after months of bitter partisan wrangling, quorum-busting tactics by Democrats, and threats of arrest by state leaders.

“PASSED THE HOUSE,” the Texas House Republican Caucus wrote triumphantly on X. “The Big Beautiful Map will ADD 5 GOP districts to our congressional delegation – A HUGE WIN for the conservative movement in Texas!”

The proposed map would grow the GOP’s U.S. House delegation from 25 to as many as 30 out of 38 seats, a historic shift in a state already considered the backbone of Republican electoral power. Gov. Greg Abbott (R) called lawmakers into a second special session after Democrats fled the state during the first round, denying Republicans a quorum and temporarily stalling the redistricting effort. With Democrats finally back in Austin this week, the outcome was never in doubt.

The debate on Wednesday stretched for hours, as Democrats peppered Republicans with amendments and rhetorical broadsides. State Rep. Barbara Gervin-Hawkins pressed Republicans on transparency.

“Would you believe it would be a great process to include the public in a way that they could see what’s going on, or do we want to do the things in the cloak of darkness here?” she asked.

“Well, you’ve been gone on the cloak of darkness for 18 days,” snapped back state Rep. Todd Hunter (R), the Republican who shepherded the map through the chamber.

For Republicans, the fight has always been about timing as much as politics. The White House pressed Texas GOP leaders earlier this year to act quickly and lock in new lines ahead of the 2026 midterms, when the president’s party traditionally faces steep headwinds. Trump himself urged lawmakers this week to “move swiftly” and secure a bigger delegation from the Lone Star State.

Democrats, meanwhile, called the plan a racially discriminatory gerrymander designed to fracture growing minority communities and suppress their voting power. They point to surging Latino populations in Houston, Dallas, and along the border that, under a more neutral map, could have yielded additional Democratic seats.

Civil rights groups and Democratic attorneys are preparing immediate lawsuits, arguing that the new lines violate federal protections for minority voters.

“We’re already drafting the complaint,” one Democratic strategist told reporters. “This will end up in federal court.”

The clash in Texas is already reverberating beyond its borders. California Democrats, led by Gov. Gavin Newsom, are openly mulling their own mid-decade redistricting to counterbalance Texas’s GOP gains. Illinois and New York Democrats are exploring similar moves, while Republicans in Florida, Indiana, and Missouri are considering opportunities to expand their maps.

However, blue state governors face an unusual challenge: Their states are already heavily gerrymandered.

Republicans accused Democrats of hypocrisy, noting that heavily Democratic states like New York and Illinois use gerrymandering to lock in their own advantages. “Texas Democrats want to cry foul here while cheering gerrymanders in their backyard,” said Rep. Brian Harrison (R–Waxahachie). “It’s pure double standards.”