A federal judge on Monday struck down President Donald Trump’s nationwide ban on new wind power projects, marking a major victory for the wind energy sector.

The ruling by Judge Patti Saris of the U.S. District Court for the District of Massachusetts deemed Trump’s ban “arbitrary and capricious and contrary to law,” and completely dismissed the president’s action.

Driving the news: Trump’s ban, enacted via memorandum on January 20, had halted all permits and leases for both offshore and onshore wind farms pending a federal review. • Seventeen states, led by New York Attorney General Letitia James, filed suit in May to overturn the ban, arguing it posed “an existential threat to the wind industry.”

The big picture: Judge Saris found that federal agencies “failed to provide a reasoned e

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