AP Photo

When Barack Obama met with Stephen Harper in Ottawa on Feb. 19, his message on the oil sands sounded like it could have been written in Calgary. He talked about the need for government investment in new technologies to cut greenhouse gas emissions, and he wanted to work together to achieve it. “I love this country and think that we could not have a better friend and ally,” Obama said. “And so I’m going to do everything that I can to make sure that our relationship is strengthened.” He added: “We are very grateful for the relationship that we have with Canada, Canada being our largest energy supplier.” Tom Corcoran, a former Republican congressman from Illinois and head of a Washington lobbying outfit for the oil sands and other...