Enbridge and former Governor Snyder made a backroom deal to build an oil tunnel through the Straits of Mackinac. With over 95% of the oil in Line 5 coming from and returning to Canada, it makes little sense for Michigan to build a tunnel for Canadian oil. A tunnel is a bad idea on many levels.
And now Enbridge is abusing its power to continue pressing for a tunnel. They are pushing Gov. Whitmer, the Michigan Legislature, and are getting support from powerful monied interests with influence in Lansing across party lines, including the Michigan Chamber of Commerce, and now Canadian officials.
A tunnel would take several years to plan and build, all while keeping the Great Lakes at risk from the current Line 5 (imagine a 78-year-old Line 5 before a tunnel is ever completed).