The GOP-controlled Indiana Senate on Thursday rejected a new congressional map that would likely yield two additional Republican-held House seats, marking the first time a Republican-led state legislature has voted down President Donald Trump’s attempt to reshape congressional districts for future elections.

The chamber cast its vote 19-31 against the proposed redistricting plan, with 21 Republicans joining all 10 Democrats in opposition. Indiana became the first Republican-led state Legislature to block Trump’s push to create more GOP-friendly congressional seats ahead of the 2026 midterm elections—a move designed to strengthen the party’s slim majority in the U.S. House.

The Indiana House had previously approved the maps crafted by the National Republican Redistricting Trust, which would have produced a nine-to-zero Republican delegation by splitting the current districts held by Democratic Reps. André Carson in Indianapolis and Frank Mrvan near Chicago along Lake Michigan.

Senate President Pro Tem Rodric Bray, the chamber’s GOP leader, has repeatedly stated that insufficient support from Republican senators made passage of the mid-decade redistricting plan unlikely. Despite ongoing pressure from Trump, Gov. Mike Braun and other advocates, the Senate maintained its stance.

“I am very disappointed that a small group of misguided State Senators have partnered with Democrats to reject this opportunity to protect Hoosiers with fair maps and to reject the leadership of President Trump,” Braun said following the vote. “Ultimately, decisions like this carry political consequences. I will be working with the President to challenge these people who do not represent the best interests of Hoosiers.”

Sen. Liz Brown, a pro-redistricting Republican, asserted that passing new maps is about “predetermining political outcomes” and emphasized it is a “privilege policy-makers have.” She stated: “The only way we can bolster Republican voices in Congress is to do this.”

The state’s legislative leaders, House Speaker Todd Huston and Senate President Pro Tem Rodric Bray, had previously met with Trump. As the Indiana House approved the maps but the Senate’s vote remained uncertain, Trump launched a sustained campaign of threats against Bray and other senators who opposed the redistricting plan—vowing to back primary opponents in 2026 and 2028 elections.

Trump’s allies, including the Club for Growth, Turning Point USA, and a group led by veteran Indiana Republican operative Marty Obst, aired advertisements, held statehouse rallies, and vowed to unseat senators who defied the president. Gov. Braun, completing his first year in office, has publicly endorsed Trump’s redistricting efforts and suggested he might challenge Bray’s Senate leadership position after Bray insisted last month that the chamber lacked sufficient votes for the new maps.