Meghan Greenfield Quoted in Law360 on Federal Lawsuit Targeting California's Clean Car Regulations

Partner Meghan Greenfield was quoted in Law360 on the Trump administration's lawsuit seeking to invalidate California's Advanced Clean Cars I regulations, which if successful, could intensify regulatory uncertainty for the U.S. auto industry.

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Meghan, a former senior counsel at the EPA and former senior appellate counsel at DOJ's Environment and Natural Resources Division, noted that while the legal arguments aren't new, the broader impact is significant: "For industry and for the states, there has been a real destabilizing impact of the variety of actions taken as a whole. People are watching closely and there's no sign that it's really letting up at all."

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© 2026 Jenner & Block LLP. Attorney Advertising. Jenner & Block LLP is an Illinois Limited Liability Partnership including professional corporations. This publication, presentation, or event is not intended to provide legal advice but to provide information on legal matters and/or firm news of interest to our clients and colleagues. Readers or attendees should seek specific legal advice before taking any action with respect to matters mentioned in this publication or at this event. The attorney responsible for this communication is Brent E. Kidwell, Jenner & Block LLP, 353 N. Clark Street, Chicago, IL 60654-3456. Prior results do not guarantee a similar outcome. Jenner & Block London LLP, an affiliate of Jenner & Block LLP, is a limited liability partnership established under the laws of the State of Delaware, USA and is authorised and regulated by the Solicitors Regulation Authority with SRA number 615729. Information regarding the data we collect and the rights you have over your data can be found in our Privacy Notice. For further inquiries, please contact dataprotection@jenner.com.

Meghan Greenfield Quoted in Law360 on Federal Lawsuit Targeting California's Clean Car Regulations

Partner Meghan Greenfield was quoted in Law360 on the Trump administration's lawsuit seeking to invalidate California's Advanced Clean Cars I regulations, which if successful, could intensify regulatory uncertainty for the U.S. auto industry.

Read More

Meghan, a former senior counsel at the EPA and former senior appellate counsel at DOJ's Environment and Natural Resources Division, noted that while the legal arguments aren't new, the broader impact is significant: "For industry and for the states, there has been a real destabilizing impact of the variety of actions taken as a whole. People are watching closely and there's no sign that it's really letting up at all."

Related Capabilities

© 2026 Jenner & Block LLP. Attorney Advertising. Jenner & Block LLP is an Illinois Limited Liability Partnership including professional corporations. This publication, presentation, or event is not intended to provide legal advice but to provide information on legal matters and/or firm news of interest to our clients and colleagues. Readers or attendees should seek specific legal advice before taking any action with respect to matters mentioned in this publication or at this event. The attorney responsible for this communication is Brent E. Kidwell, Jenner & Block LLP, 353 N. Clark Street, Chicago, IL 60654-3456. Prior results do not guarantee a similar outcome. Jenner & Block London LLP, an affiliate of Jenner & Block LLP, is a limited liability partnership established under the laws of the State of Delaware, USA and is authorised and regulated by the Solicitors Regulation Authority with SRA number 615729. Information regarding the data we collect and the rights you have over your data can be found in our Privacy Notice. For further inquiries, please contact dataprotection@jenner.com.

News and Insights

Publications

The Form Rules Everything: A Seventh Circuit Ruling on ERISA's Substantial Compliance Doctrine

Partner Joseph Torres and Special Counsel Jennifer Beach authored an article for Employee Relations Law Journal examining the Seventh Circuit's decision in Packaging Corp. of America Thrift Plan for Hourly Employees v. Langdon, a ruling that addresses both the standard of review in ERISA interpleader actions and the continued viability of the substantial compliance doctrine for changing plan beneficiaries.

October 5, 2026

Recognition

Jenner & Block Rises in American Lawyer Rankings for Summer Associate Experience

Jenner & Block ranked 14th nationally in The American Lawyer’s 2026 Summer Associate Satisfaction Survey, jumping 10 spots from last year. The annual survey measures summer associate satisfaction at US law firms based on ratings provided directly by summer associates across key firm qualities.

October 2, 2026

Publications

Partner Ashley Callen Discusses Potential Congressional Investigations in Reuters

Partner Ashley Callen was quoted in a Reuters article examining how Democrats could ramp up congressional investigations into Trump family business dealings if they win control of the House or Senate in the 2026 midterm elections this November.

September 30, 2026

Publications

Jenner & Block Marks Equal Time’s 25th Anniversary of Celebrating Community 

Jenner & Block released the 25th edition of Equal Time, the firm’s annual inclusion and engagement report centered on “Celebrating Community.”

September 23, 2026