WASHINGTON—Courts in the United States would take “many, many years” to resolve the battle between Canada and Michigan over Line 5, the pipeline’s operator told MPs Tuesday as he pleaded for a negotiated solution to the dispute. Shutting down the cross-border pipeline would trigger a major jobs and energy crisis in both countries and hamstring collective efforts to confront climate change, Enbridge Inc. executive vice-president Vern Yu told a House of Commons committee. “The stakes could not be higher,” Yu testified before the special committee examining the economic relationship between Canada and the U.S. “The shutdown of the pipeline could cause great economic harm to citizens both in the United States and Canada.” Line 5, which runs through Michigan from the Wisconsin city of Superior to Sarnia, Ont., crosses the Great Lakes beneath the environmentally sensitive Straits of Mackinac, which link Lake Michigan to Lake Huron. Enbridge wants to build …