Oregon AG Leads 24-State Coalition in Dual Legal Challenges to Federal Actions

Oregon Attorney General Dan Rayfield is leading coordinated multi-state legal challenges on two fronts, suing the EPA over particulate matter standards and joining 23 other attorneys general in seeking to block a mail voting executive order. The dual actions represent a coordinated state-level resistance strategy to federal policy changes under the Trump administration.

Oregon AG Sues EPA Over PM2.5 Nonattainment Failure
Oregon Attorney General Dan Rayfield, joined by attorneys general of 13 other states and local governments, filed suit in the United States District Court for the Northern District of California against the EPA for failing to designate areas as in or out of attainment with the 2024 National Ambient Air Quality Standards (NAAQS) for fine particulate matter (PM2.5). The coalition alleges EPA violated the Clean Air Act by missing its deadline to make these designations after strengthening the soot standard in 2024. The plaintiffs are seeking declaratory and injunctive relief, including a court order requiring EPA to complete the designations within 150 days of the order. The coalition estimates full attainment of the 2024 standard would avoid 4,500 premature deaths, 2,000 ER visits, 5,700 asthma cases, and 1,000 hospital admissions in the first year alone.

24 AGs File to Block Trump Mail Voting Order
Attorney General Dan Rayfield and a coalition of 24 attorneys general and governors filed a motion for summary judgment on April 24, 2026, asking the U.S. District Court for the District of Massachusetts to permanently block Executive Order No. 14399, which seeks to restrict mail voting by requiring federal pre-authorized voter eligibility lists. The coalition argues the order unconstitutionally invades states' authority over voter rolls, exceeds presidential power to regulate federal elections, and threatens fiscal injury by forcing states to comply with new federal election procedures. The court has ordered the Trump Administration to respond by May 7, 2026, with oral argument scheduled for June 2, 2026 at 7:00 AM PT.