Michigan Attorney General Dana Nessel (D) has declared unconstitutional a late-2018 law that would create an authority to oversee construction of a key tunnel. The tunnel would house an oil-and-gas pipeline under the Straits of Mackinac.
The state’s Republican-led Legislature approved the law in December, and former Gov. Rick Snyder (R) signed the bill to create the Mackinac Corridor Authority. It would oversee Enbridge’s construction of a tunnel beneath the straits to replace the company’s aging Line 5 pipeline. The underwater line carries oil and natural gas to Michigan’s Upper Peninsula, as well as Wisconsin and Canada.