California asks judge to toss Trump suit against emissions rules

By Alex Nieves | 05/27/2026 12:33 PM EDT

The motion comes two months after the administration accused state officials of illegally enforcing an electric vehicle mandate.

Exhaust comes from the tailpipe of a vehicle.

California and the Trump administration are in a legal fight over the state's authority to enforce tailpipe emissions rules. Rick Bowmer/AP

California air quality officials on Tuesday filed a motion to dismiss a Trump administration lawsuit that seeks to block the state from enforcing 14-year-old vehicle emissions standards.

What happened: The California Air Resources Board said in the filing that the U.S. Department of Transportation does not have standing to sue over the agency’s 2012 vehicle rules, arguing that the federal government failed to show how the regulations have the potential to negatively harm automakers or car buyers.

“Plaintiffs ask this Court to invalidate these standards without pleading any facts establishing how these standards — including ZEV standards that sunset with model year 2025 — currently impact their operations or activities,” the motion reads.

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Why it matters: The Trump administration’s attempt to dismantle California’s regulatory authority comes after Congress revoked an EPA waiver last year that allowed the state to enforce the nation’s strictest emissions rules — passed in 2022 — including a ban on new gas car sales starting in 2035.

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