Whitmer, saying it would not shut the line down unless ordered to do so by a judge.... In a June 1 filing, Michigan Attorney-General Dana Nessel argued the 1977 pipeline transit treaty between Canada and the United States has no bearing on what it considers its right to unilaterally shut down Line 5.... Nessel also disputed whether negotiations under the 44-year-old treaty were actually taking place.In a June 21 letter to Janet Neff, the U.S. district judge presiding over the Enbridge-Michigan