A federal judge ordered Monday the shutdown of the Dakota Access Pipeline — a project at the heart of battles over oil-and-gas infrastructure — while the U.S. Army Corps of Engineers conducts a new environmental analysis.

Why it matters: The latest twist in the years-long fight over the pipeline is a defeat for the White House agenda of advancing fossil fuel projects and a win for Native Americans and environmentalists who oppose the project

• The pipeline, which runs from North Dakota to an oil storage terminal in Illinois, began operating in 2017 with the backing of the Trump administration after several years of regulatory and legal jostling and major protests.

What happened: Judge James E. Boasberg of the U.S. District Court for the D.C. Circuit vacated a critical easement while the Army Corps of Engineers prepares a previously ordered study called an environmental impact statement.

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