In a setback for federal efforts to thwart climate litigation, the judge ruled that the suit, which tried to block the state from suing oil companies, was too speculative.

WPP, Dentsu and Publicis settled claims they colluded on policies to combat misinformation, denying ad revenue to publishers on the right.

Appealing the dismissal of their suit, they argued that executive orders to promote fossil fuels endangered their futures and violated their constitutional rights.