Less than two weeks before Election Day, the contest over California’s new U.S. House district maps is intensifying, with opponents of the proposal facing dwindling advertising resources and limited options to reach voters.
While the outcome remains uncertain and California ballot measures have a history of unexpected results, data indicates that TV advertising by Republicans and other critics has dropped significantly. In contrast, Democrats and supporters of the redistricting plan have maintained a strong presence on broadcast TV, cable, and radio. According to AdImpact, nearly $9 million in ad buys have been reserved by supporters, while opponents have little time booked. These figures do not include some digital platforms or mail campaigns.
AdImpact also reports that supporters have aired close to $70 million in ads so far, compared to about $31 million from opponents.
The proposed map was advanced by Democratic Governor Gavin Newsom as part of an effort to strengthen his party’s position ahead of the 2026 midterm elections. The move comes as Democrats seek to counter Republican gains in states like Texas. Voting began earlier this month and will conclude on November 4.
So far, more than 1.5 million Democratic mail ballots have been returned—outpacing approximately 853,000 Republican ballots—a trend consistent with the state’s voter registration breakdown, where Democrats outnumber Republicans nearly two-to-one.
The result of Proposition 50 could influence national politics. If Democrats regain control of the House through these changes, it could affect President Donald Trump’s agenda for the remainder of his term. Newsom is also seen as a potential contender for the presidency in 2028 and could benefit politically if his redistricting plan succeeds.
“If we lose this election in California it means Democrats have virtually no chance of taking back the House,” Newsom said recently in a fundraising message to supporters.
Earlier in the campaign cycle, opposition groups received a $5 million contribution from the Congressional Leadership Fund—a super PAC linked to House Speaker Mike Johnson—but anticipated late-stage financial support from national Republican donors has not materialized. GOP donors may be hesitant due to California’s political landscape and are weighing their investments as they defend narrow majorities across Congress nationwide.
Tim Lineberger, who previously worked on Donald Trump’s campaign and administration, noted that with important races across several states approaching next year’s midterms, “those dollars might go elsewhere ‘rather than fight what might be inevitable here.’” Still, he emphasized that “it’s still an important fight to have in this state.”
Longtime strategist Jon Fleishman questioned whether investing heavily in California would impact broader Republican goals: “Does the road to the White House or the Senate or the House really run through California?” He added that if significant national funding does not arrive soon for opponents of Proposition 50, “we may be getting an unfortunate answer to that question.”
The new districts were drawn by Democrats behind closed doors with an aim to add five Democratic seats—offsetting expected Republican gains in Texas—and potentially increasing their share from 43 out of 52 congressional seats up to 48. However, Republicans are pursuing similar strategies in other states such as Missouri, North Carolina, and Indiana; currently they hold a slim majority (219-213) in the U.S. House with three vacancies.
Governor Newsom has framed Proposition 50 as essential for protecting democracy against Trump-aligned policies; meanwhile Republicans argue it is a partisan power grab that undermines independent redistricting efforts established previously.
Charles Munger Jr., son of billionaire Charlie Munger and longtime supporter of independent redistricting reforms in California, has contributed over $30 million toward blocking Newsom’s plan. He told reporters: “Is this good for you? Do you want to trust these people who drew these maps this way?”
High-profile figures including former Governor Arnold Schwarzenegger oppose Proposition 50 while former President Barack Obama supports it alongside Newsom; however there is no candidate at stake which has led some observers to note a lack of dramatic tension typical for such contests.
Supporters hope focusing on opposition to Trump will mobilize Democratic turnout needed for victory since only one quarter of registered voters are Republicans statewide; opponents must rely on high GOP participation along with persuading independents and some Democrats.
At a recent rally near Los Angeles opposing Proposition 50, retiree Anne White criticized aspects of the proposal she said would combine rural areas favoring Republicans with liberal coastal cities into single districts.
