This drama is about to get next level. Ottawa has the constitutional authority to regulate trade/commerce and international arrangements. Provinces have constitutional authority over natural resources. 

Energy is probably our best negotiating gambit with Donald Trump, yet a cut-off would be extremely damaging in the short-term to the entire country, and especially oil producing provinces. 

Would Alberta defy a Federal energy cutoff?

They very well could. At the least it would absolutely sour already dismal relationships with western provinces.

The drama is about to get next level.