This photo provided by the Michigan Department of Environment, Great Lakes, and Energy in June 2020 shows damage to an anchor support on the east leg of the Enbridge Line 5 pipeline in the Straits of Mackinac, displayed on a television screen. (Michigan Department of Environment, Great Lakes, and Energy via AP, file)

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 segment of the line runs under the Straits of Mackinac, a chan

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