No one wanted it. Why would any sane company want to inherit the same grief Kinder Morgan had trying to build something in Canada. Now that Canada owns it FN are interested in getting involved. I hope they do. Alberta can't turn off the tap, the courts have already said so and besides, half the present line's capacity goes to US refineries. They would not be impressed.
The NDP power base is in the Lower Mainland and Island where opposition to the TMX was strongest. Politics.