Los Angeles. California Governor Gavin Newsom stood with other prominent Democratic leaders Thursday to announce that the state will move forward with a partisan plan to redraw congressional maps in an effort to help his party win five more US House seats in 2026.

The move is a direct response to a Republican-led effort in Texas, pushed by President Donald Trump as his party seeks to maintain its slim House majority after the midterm elections. Texas lawmakers are considering a new map that would help them send five more Republicans to Washington, but Democrats have so far halted a vote by leaving the state to prevent their GOP colleagues from meeting Trump’s demands.

Newsom called for a Nov. 4 special election to put the new maps before voters, who must give their approval for them to be in place for the next election. He released a campaign ad on social media as Democrats kicked off a news conference where Newsom stood with a coalition of union leaders and US senators Adam Schiff and Alex Padilla. State lawmakers must officially declare the special election, which they plan to do next week.

The Democrats' proposed maps still haven't been released. That's expected on Friday. Then, lawmakers plan to quickly approve them next week. Democrats hold supermajorities in both chambers.

Newsom, who is seen as a potential 2028 presidential candidate, urged Trump in a letter earlier this week to abandon his scheme, telling the president he is “playing with fire” and “risking the destabilization of our democracy.”

The California map would only take effect if Texas and other states move forward with their own redistricting efforts, and they would remain through the 2030 elections. After that, Democrats say they would return mapmaking power to an independent redistricting commission approved by voters more than a decade ago.

There are 435 seats in the US House, and Republicans currently hold a 219-212 majority, with four vacancies. New maps are typically drawn once a decade after the census is conducted. Many states give legislators the power to draw maps but some, like California, rely on an independent commission that is supposed to be nonpartisan.

The Thursday announcement marks the first time any state beyond Texas is officially wading into the mid-decade redistricting fight, kicking off a national standoff that could continue spilling into other states.

California Democrats face more complex legal and logistical hurdles than Republicans do in Texas. It’s not clear how voters would respond to the mid-decade effort after they voted to give the power of drawing congressional maps to an independent commission in 2010. In Texas, that power lies with the Republican-controlled Legislature.

Some already said they would sue to block the effort, and influential voices, including former California Governor Arnold Schwarzenegger, may campaign against it.

“Gavin Newsom’s latest stunt has nothing to do with Californians and everything to do with consolidating radical Democrat power, silencing California voters, and propping up his pathetic 2028 presidential pipe dream,” National Republican Congressional Committee spokesperson Christian Martinez said in a statement. “Newsom’s made it clear: he’ll shred California’s Constitution and trample over democracy - running a cynical, self-serving playbook where Californians are an afterthought and power is the only priority.”

California Democrats already hold 43 of the state’s 52 House seats, and the state has some of the most competitive House seats.

Elsewhere, leaders from red Florida to blue New York are threatening to write their own new maps, bucking the standard once-a-decade redistricting process that happens after the census. But none have moved as far as Texas and, soon, California, in advancing new maps.

Missouri lawmakers are waiting for Governor Mike Kehoe to call a special session to draw more favorable Republican maps, and a document obtained by The Associated Press shows the state Senate has received a $46,000 invoice to activate six redistricting software licenses and provide training for up to 10 staff members.