This will be particularity critical if the Northern Gateway Pipeline does not get built or the XL line.
With the east west pipeline in place, production of the Oil Sands will be ramped up to meet demand.
If the NDP form Government, they will be able to control the price of oil flowing east, thereby satisfying their eastern voting base.
With ramped up oil production, and no options to sell their oil elsewhere, the oil companies will be forced to produce oil for the easterners at a discounted rate.