Yet Canada's environment ministry now says emissions in 2020 will be unchanged from 2005, as cuts elsewhere are offset by increasing emissions from the oil sands. The Toronto Globe and Mail reported the current government has offered "no plan to close the gap" between Canada's target and its current trajectory.
Redford will probably also want to discuss last week's reports that the Canadian oil industry won a delay on governmental regulations that would have reduced the emissions per barrel of oil or fined polluters, saying the restrictions were too onerous. The industry wants the proposed reduction to be cut in half. The draft regulations, which the Harper government promised by July, have yet to be released.
Any U.S. official sitting across the table from Redford will be aware that the administration of President Barack Obama is taking a thumping from Republicans for increasing regulations on coal. That includes proposed emission restrictions for new coal plants, and rules set to be issued next year on existing plants.
So the question that Redford should be ready to answer is why Democrats, having taken a tough line on the U.S. coal industry at some political expense, should make an effort on Keystone to help Canadian officials who have been unwilling to undergo any comparable pain of their own. What's the point of decreasing emissions at home only to let them increase in Canada, especially if Democrats lose votes on both counts?
What can Redford offer in response to those concerns? What can Canada offer that President Barack Obama's administration can present to the project's opponents as evidence that, even if the pipeline is approved, their fight wasn't for nothing?
Harper reportedly sent Obama a letter in August, offering "joint action to reduce greenhouse gas emissions in the oil and gas sector." It's possible that Redford is coming to advance those negotiations by offering something specific -- perhaps a compromise on the delayed emissions rules -- or to find out more about just what the administration would be willing to accept in return for approving the pipeline.
Yet, if the past few weeks in Canada are any indication, it seems more likely that the premier will spend her time repeating old arguments and winning few converts.