Whitmer urges Enbridge to shut down Line 5 within months, calls pipeline a threat to Great LakesGov. Gretchen Whitmer wrote to Enbridge's outgoing CEO urging the company to stop using Line 5 and find an alternative to the 73-year-old pipeline rather than wait for a tunnel that could be a decade away.CBS News28d agoWhole story →PlanetGretchen Whitmerline 5 pipeline dispute