The numbers: Tesla sold just over 42,000 vehicles during the first quarter — a decline of more than 7,000 compared to last year — accounting for 43.9 percent of California’s total EV market. The company represented a whopping 80 percent of the state’s electric sector in 2020.

Californians further soured on Tesla in the first quarter, pulling down the electric-vehicle maker's registrations by 15% as backlash against Elon Musk's company intensified in the state that has embraced EVs most across the United States.

Tesla sales fell 15% in California last quarter, even as new car registrations jumped. The EV maker has now seen six straight quarters of decline.