A federal judge has struck down a Trump-era rule that dramatically rolled back protections of the Clean Water Act. In 2019, Trump’s Environmental Protection Agency redefined its “Waters of the United States” rule to end protections for hundreds of thousands of miles of streams and rivers and more than half of all wetlands. Six federally recognized Native American tribes sued, and on Monday a U.S. district judge in Arizona took their side, ruling the Trump administration’s process was riddled with errors and that allowing the rule to proceed could lead to “serious environmental harm.”