The Trump administration is stepping into the legal fight over whether Enbridge can continue to operate an aging pipeline beneath a Great Lakes channel, arguing that Michigan Gov. Gretchen Whitmer interfered with U.S. foreign policy when she revoked the line's easement almost five years ago.
The pipeline, known as Line 5, has moved crude oil between Superior, Wisconsin, and Sarnia, Ontario, since 1953. A 4.5-mile (6.4-kilometer) segment of the line runs under the Straits of Mackinac, a channel that links Lake Michigan and Lake Huron.
