Subscriber content previewBy JEFFREY COLLINSAssociated PressAP Photo/John Flesher, File [enlarge] An above ground section of Enbridge's Line 5 at the Mackinaw City, Mich., pump station in 2016. The Michigan Supreme Court has ordered state regulators to reconsider a key permit that allowed a planned tunnel to carry an oil pipeline under part of the Great Lakes to move forward.