California’s upcoming midterm elections in November could play a decisive role in the fate of a proposed mileage-based tax that has generated significant debate within the state. The tax would charge drivers between 6 and 9 cents for each mile they travel, supplementing existing gasoline and vehicle-related taxes.

State Assemblyman Carl DeMaio has voiced concerns that California Democrats might leverage their current two-thirds supermajority in the state Legislature to enact the mileage tax. He argued that reducing the Democratic majority below this threshold in the 2026 election would likely stall the initiative.

Supporters of the measure argue that a mileage-based tax reflects a fairer approach to transportation funding, particularly as increasing numbers of electric and fuel-efficient vehicles reduce gas tax revenues. Critics, however, worry about the financial impact on drivers and potential privacy issues related to tracking mileage.

The November elections, therefore, are seen as a critical juncture that will shape the state’s approach to transportation funding and taxation in the coming years.