Michigan Gov. Gretchen Whitmer has abruptly abandoned her federal court case aimed at shutting down the cross-border Line 5 pipeline. Instead, Attorney General Dana Nessel says Whitmer will concentrate the government’s efforts on a long-standing state court action against pipeline owner Enbridge Inc. that was originally filed in 2019. In a statement, Nessel says the original case remains the “quickest and most viable path” towards getting Line 5 permanently decommissioned. Michigan’s efforts suffered a blow earlier this month when a U.S. District Court judge sided with Enbridge and allowed Whitmer’s case to remain in federal court. Last November, Whitmer revoked the 68-year-old easement that allowed Enbridge to operate the line, fearing an environmental catastrophe in the Straits of Mackinac, where Line 5 crosses the Great Lakes. The National Wildlife Association cheered the decision to abandon the court case, calling Line 5 a “ticking time bomb,” and supporting Nessel’s motion to reopen the 2019 action. “We’ve had enough of …