Tesla sales in California dropped 24.1 % in the second quarter, the brand’s third straight quarterly decline in the state. Purchases dipped 7.8% in the first quarter of 2024 and 9.8% in the final quarter of last year. Year-to-date, Tesla sales in California are down 17% compared to last year, according to the latest analysis of new vehicle registrations published by the California New Car Dealers Association (CNCDA). Instead of a Tesla from Musk’s $793 billion electric vehicle empire, California car buyers are purchasing battery-electric vehicles (BEVs) from Toyota, Hyundai, and Ford. The analysis found Toyota BEV registrations have soared 108.1% so far this year, while Hyundai and Ford BEV registrations rose 65.7% and 26.4%, respectively.  

Plenty of factors are at play in Tesla’s sales decline, Brian Maas, president of the CNCDA, told Fortune. The Tesla Model 3 and Model Y are substantially the same vehicles they were five years ago, and buyers interested in those cars might represent a finite share of the market—and they might already own a Tesla. Without new models to entice customers, buyers look elsewhere for new cars, he said. And while Tesla has dominated the EV market, the past several years have seen competitors creep in and erode the company’s share with lower costs, newer cars, and greater variety, he explained. Accordingly, the Hyundai Ioniq 5 is now the third best-selling EV in California this year, wresting control of third place from the Tesla Model X, the CNCDA analysis found.

And while the data is based only on registrations in California, branding could work against Musk. About 46.9% of registered voters in California are Democrats, while 23.9% of registered voters are Republicans. According to reputational management firm Caliber, more Republicans trust and like Musk than Democrats. Critically, however, more Democrats are willing to buy Teslas, which could be because Democrats are more likely to prioritize buying an electric vehicle over a gas-powered car, Caliber CEO Shahar Silbershatz told Fortune’s Eva Roytburg.

Now, staunchly Blue California has learned about Musk’s reported $45 million a month donation to a pro-Trump Super PAC and his endorsement of the former president and Republican Party nominee. This might not bode well for already declining sales, and the Hyundai Ioniq’s rising popularity could be the first blush of a blue backlash.

“When there’s a shift in the brand, that’s always going to have an impact on consumer behavior,” said Maas.  

To be sure, Tesla is still the car of choice in California. The top-selling car is the Tesla Model Y in the new-vehicle market of BEVs and plug-in hybrids. The second top-selling BEV and plug-in model is the Model 3. Yet, California has embraced BEVs in droves, while other car buyers haven’t been as enthusiastic. According to Experian, California’s BEV market share is 21.4%, while the overall U.S. market share of BEVs is 7.5%.

Without detailed research, it’s difficult to connect Musk’s political views with buying trends, in Maas’ view. It’s more likely that Tesla sales are sluggish because the cars haven’t been revised or refreshed in years and people invest in durability, features, safety, and affordability—not a CEO’s mindset.

“Mr. Musk’s political views could change tomorrow,” said Maas. “That being said, I assume the effect is not zero.”