Democrats now have a shot at winning as many as five additional seats in 2026. California voters approved new congressional district boundaries Tuesday, delivering a victory for Democrats in the state-by-state redistricting battle that will help determine which party wins control of the U.S. House in 2026 and, with it, the power to thwart or advance President Donald Trump’s agenda.The approval of Proposition 50 gives Democrats a shot at winning as many as five additional seats, just enough to blunt Texas Republicans’ move to redraw their own maps to pick up five GOP seats at Trump’s urging. Texas’ move and California’s response have kicked off a flurry of redistricting efforts around the country, with Republican states appearing to have an edge. Deeply blue California is Democrats’ best opportunity to make up seats.Midterm elections typically punish the party in the White House, and Trump is fighting to maintain his party’s slim House majority. Republicans hold 219 seats to Democrats’ 213.Tuesday’s results mark a political victory for Democratic Gov. Gavin Newsom, who cast the measure as an essential tool to fight back against Trump and protect American democracy.Speaking to reporters in Sacramento, Newsom cast the California vote as part of a broader national rejection of Trump’s policies that saw Democratic governors elevated in New Jersey and Virginia. But he warned the more consequential battle would come next year.If Democrats win the House majority, they can “end Donald Trump’s presidency as we know it,” Newsom said. “It is all on the line, a bright line, in 2026.”