Editorial: Line 5 moves are playing with fire Crain's Detroit Business Enbridge's Line 5 runs beneath the Straits of Mackinac. Gov. Gretchen Whitmer's crusade to force Enbridge Energy to shut down its Line 5 pipeline is courting both economic and political disaster. Whitmer and Attorney General Dana Nessel are playing chicken by threatening to seize Enbridge's profits if the company doesn't shut down the line under the Straits of Mackinac in a move they say is needed to protect the Great Lakes. But in recent months, we have seen multiple examples of what happens when critical infrastructure suddenly shuts down. Whitmer is doggedly trying to make that happen with a pipeline that has never seen an oil spill.