Virginia voters approved a map that gives Democrats the chance to net as many as four US House seats in a major boost to the party’s effort to win House control in the midterms.

The map set to go into effect represents one of the most extreme political gerrymanders of the 2026 election cycle, giving Democrats an electoral advantage in 10 of the state’s 11 House districts. Currently, Democrats control six of those seats.

Tuesday’s referendum drew a multimillion-dollar campaign to persuade Virginians to alter the state constitution to temporarily allow lines crafted by the state’s Democratic-controlled legislature to govern the election this fall, in 2028 and in 2030.

Virginia is the latest to engage in the once-rare practice of mid-decade redistricting as both political parties hunt for advantage ahead of November’s elections for Congress. Republicans hold a paper-thin majority in the House and face the headwinds of history: The president’s party typically loses ground in Congress in the midterms.

With Tuesday’s victory, Democrats have redrawn 10 seats nationally to their advantage since Texas kicked off mid-decade redistricting, compared to Republicans’ nine.