Enbridge Inc (ENB.TO) shut down its Line 5 oil pipeline for several hours on Tuesday after protesters trespassed onto a facility in Michigan and tampered with the pipeline, an Enbridge spokesman said on Wednesday. Line 5 is at the centre of a long-running environmental dispute between Calgary-based Enbridge and the state of Michigan that has embroiled the Canadian and U.S. governments. read more Michigan Governor Gretchen Whitmer ordered the company to stop operating the pipeline by May because of concerns a section running underwater in the Straits of Mackinac could leak into the Great Lakes. Enbridge ignored that order and the two sides are embroiled in a legal battle over Line 5’s fate. Earlier this month the Canadian government, which backs Enbridge, escalated the dispute by invoking a decades-old pipeline treaty with the United States to trigger negotiations with Washington. Line 5 ships […]