HELENA, Mont. -

Montana utility regulators have dropped a proposal to spend $3,000 to hire a former University of Montana law professor to point out constitutional problems with proposed federal regulations to reduce carbon dioxide pollution.
    
Public Service Commission member Roger Koopman says he proposed hiring Rob Natelson because Koopman believes the proposed Environmental Protection Agency regulations are an overreach of federal power, but he doesn't specifically know how.
    
Natelson is a senior fellow at the Colorado-based Independence Institute specializing in constitutional law. He ran twice for Montana governor, was active in conservative politics and won a grievance filed against the University of Montana to teach constitutional law there.
    
Koopman withdrew his proposal Tuesday after other commissioners said constitutional questions are a matter for the attorney general, not the commission.