Supporters of the November ballot measure to reconfigure California’s congressional districts — an effort led by Gov. Gavin Newsom to help Democrats win control of the U.S. House of Representatives next year — have far out-raised the opposition campaigns, according to fundraising disclosures filed with the state. The primary group backing Proposition 50 raked in $77.5 million and spent $28.1 ...

Supporters of the November ballot measure to reconfigure California’ s congressional districts— an effort led by Newsom to help Democrats win control of the U.S. House of Representatives next year— have far out-raised the opposition campaigns, according to fundraising disclosures filed with the state.

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Supporters of the November ballot measure to reconfigure California’s congressional districts — an effort led by Gov. Gavin Newsom to help Democrats win control of the U.S. House of Representatives next year — have far out-raised the opposition campaigns, according to fundraising disclosures filed with the state.

The primary group backing Proposition 50 raked in $77.5 million and spent $28.1 million through Sept. 20, according to a campaign finance report that was filed with the secretary of state’s office on Thursday.

The committee has $54.4 million in the bank for the final weeks of the campaign, so Californian should expect a blizzard of television ads, mailers, phone calls and other efforts to sway voters before the Nov. 4 special election.

The two main groups opposing the ballot measure have raised $35.3 million, spent $27.4 million and have roughly $8.8 million in the bank combined, campaign finance reports show.

Despite having an overwhelming financial advantage, the campaign supporting Proposition 50 has tried to portray itself as the underdog in a fight to raise money against opposition campaigns with ties to President Donald Trump and his supporters.

“MAGA donors keep pouring millions into the campaign to stop Prop. 50 in the hopes of pleasing their ‘Dear Leader,’” said Hannah Milgrom, a spokesperson for the Yes on 50, the Election Rigging Response Act campaign. “We will not take our foot off the gas — Prop. 50 is America’s best chance to stop this reckless and dangerous president, and we will keep doing everything we can to ensure every Californian knows the stakes and is ready to vote yes on 50 this Nov. 4th.”

A spokesperson for one of the anti-Proposition 50 campaigns, which was sending mailers to voters even before the Democratic-led California Legislature placed Proposition 50 on the November ballot, said their priority was to help Californians understand the inappropriateness of redrawing congressional boundaries that had been created by a voter-approved, state independent commission.

“We started communicating with voters early about the consequences of having politicians draw their own lines,” said Amy Thoma, a spokesperson for a coalition that opposes the ballot measure. “We are confident we’ll have the resources necessary to continue through election day.”

A spokesperson for the other main anti-Proposition 50 group agreed.

“When you’re selling a lemon, no amount of cash can change the taste. We’re confident in raising more than sufficient resources to expose Prop. 50 for the blatant political power grab that it is,” said Ellie Hockenbury, an adviser to the No on 50 - Stop Sacramento’s Power Grab campaign. Newsom “can’t change the fact that Prop. 50 is nothing more than a ploy for politicians to take the power of redistricting away from the voters and charge them for the privilege at a massive cost to taxpayers.”

The special election is expected to cost the state and the counties $282 million, according to the secretary of state’s office and the state department of finance.

If approved, Proposition 50 would have a major effect on California’s 2026 congressional elections, which will play a major role in determining whether Trump is able to continue enacting his agenda in the final two years of his tenure. The party that wins the White House frequently loses congressional seats two years later, and Republicans hold a razor-thin majority in the House.

After Trump urged GOP-led states, notably Texas, to redraw their congressional districts to increase the number of Republicans elected to Congress in next year’s midterm election, Newsom and other California Democrats responded by proposing a counter-effort to boost the ranks of their party in the legislative body.

California’s congressional districts are drawn once every decade after the U.S. Census by a voter-approved independent redistricting commission. So Democrats’ proposal to replace the districts with new boundaries proposed by state lawmakers must be approved by voters. The state Legislature voted in August to put the measure before voters in a special election on Nov. 4.

Polling about the proposition is not definitive. It’s an off-year election, which means turnout is likely to be low and the electorate is unpredictable. And relatively few Californians pay attention to redistricting, the esoteric process of redrawing congressional districts.

There are more than 30 campaign committees associated with Proposition 50 registered with the secretary of state’s office, but only three have raised large amounts of money.

Newsom’s pro-Proposition 50 effort has received several large donations since its launch, including $10 million from billionaire financier George Soros, $7.6 million from House Majority PAC (the Democrats’ congressional political arm) and $4.5 million from various Service Employees International Union groups. Former Google CEO Eric Schmidt and his wife have contributed $1 million to a separate committee supporting the proposition.

The opposition groups had few small-dollar donors and were largely funded by two sources — $30 million in loans from Charles Munger Jr., who for years has been a major Republican donor in California, and a $5-million donation from the Congressional Leadership Fund, the GOP political arm of House Republicans.