The battle over Proposition 50, explained
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In his defense of Prop. 50, Gov. Gavin Newsom has said California must "fight fire with fire" in the nationwide redistricting arms race. Photo: Mario Tama/Getty Images
California voters began receiving ballots in their mailboxes this week for a Nov. 4 special election that could reshape the balance of power in Congress.
Why it matters: This vote could ripple into the 2026 midterms — and even the 2028 presidential race.
State of play: Proposition 50 — or the Election Rigging Response Act — would let lawmakers redraw the state's congressional map, shifting as many as five GOP-held seats into Democrat-leaning districts.
The big picture: Led by Gov. Gavin Newsom, California's latest ballot measure responds to a redistricting push sparked by President Trump.
- In July, the president urged Texas Republicans to redraw their congressional maps to gain seats — with other Republican-led states quickly following suit.
- Newsom retaliated by proposing a "trigger" ballot measure in August.
How it works: If approved, the proposal would amend a 2008 law that created California's independent redistricting commission.
- The Legislature would temporarily take over mapmaking for the next three election cycles — 2026, 2028 and 2030 — before power returns to the commission. Because redistricting is written into the state constitution, the measure needs a simple majority to pass.
What they're saying: Supporters — including top Democrats and major donors like billionaire George Soros — frame the measure as a defensive "fighting fire with fire" move against GOP gerrymandering, arguing California must act to protect national representation and counteract an uneven playing field.
The other side: Opponents — including Republicans and former Gov. Arnold Schwarzenegger — say it would undo voter-approved reforms, politicize mapmaking and set a dangerous precedent.
By the numbers: Proposition 50 is now one of the most expensive ballot fights in state history, with more than $206 million raised on both sides as of Oct. 7, per the California Secretary of State's database.
Zoom in: California currently has 43 Democrats and nine Republicans in the U.S. House. Here's how districts could change:
- Key battleground regions — including the Central Valley, Inland Empire, Orange County, northern LA County, San Diego and Northern California — would be affected with leftward shifts significantly diluting the number of Republican voters.
- Northern California would shift left, with Rep. Doug LaMalfa (D-1) losing rural counties and Rep. Kevin Kiley (D-3) gaining more of liberal Sacramento County.
- Swing seats held by Reps. Adam Gray (D-13), Josh Harder (D-9) and George Whitesides (D-27) would tilt more Democratic, while Reps. David Valadao (D-22) and Darrell Issa (D-48) would face tougher reelection odds, per a San Francisco Chronicle analysis.
What's next: Attorney General Rob Bonta is urging Californians to mail their ballots early because new U.S. Postal Service policies could delay postmarks, leaving ballots dropped off on Election Day uncounted.