Two Canadian provinces are engaged in a spat over pipeline politics. In a move tantamount to an attempt to obstruct a $6 billion project to expand Kinder Morgan's Trans Mountain pipeline from Alberta, British Columbia announced potential new oil shipment rules on Jan. 30. In response, Alberta Premier Rachel Notley declared Feb. 1 that her government would put a hold on electricity trade talks with British Columbia. The latter province, which has long imported cheaply priced electricity from Alberta at night to export at higher prices during the day, could lose as much as $500 million annually if the trade relationship is severed for a long period of time. And Notley has said this is just the first of many moves against British Columbia....