The U.S. Justice Dept. filed suit against Minnesota on May 4, seeking to block the state’s long-running climate deception case against major energy companies—a filing that comes just three weeks after the state Supreme Court cleared that same case to proceed to discovery. Filed in the U.S. District Court based in Minneapolis, the Justice Department contends in its argument that Minnesota is attempting to “regulate global greenhouse gas emissions” through state law, an authority the DOJ says belongs exclusively to the federal government under the Clean Air Act and the U.S. Constitution. The Justice Dept. action targets Minnesota’s 2020 lawsuit against ExxonMobil, Koch Industries, Koch subsidiary Flint Hills Resources and the American Petroleum Institute, which alleges the companies misled the public for decades about the causes and costs of climate change.…