There are a number of points to consider:
1. A gateway pipeline south to the U.S. ? Remote.The Republicans and Democrats have been and are still locked in a bitter political civil war that should leave the American people feeling outraged and betrayed.As of 2012 Congress had nearly 2000 pieces of legislation to deal with and dealt with a mere 100 To my mind America is at a point in it's history,similar to the height of the Roman Empire,which experienced a gradual decline and fall.
2. The rising power region and future power brokers will be in the Far East: Japan,Russia,India,China and so on.
3. We need to diversify our national economic portfolio:much as you would not put all your financial investments into only one sector.With Canada so closely tied to the U.S. it makes sense to diversify our trade folio: the EU and The Far East are logical choices.
4. We are in a sense a merchant with a product to sell and we need buyers to give us money for the sale of our product.In our case we have oil and we need a steady and consistent customer to sell too.
5. With fast growing economies in the Far East whose growth will be fuelled by reliable supplies of oil,then politics aside,it is for Canada a pragmatic business decision.
6. Instability in the Middle East and surrounding regions make Canada seem more the go to choice as a stable and reliable supplier of oil.
6. It seems to me from a business perspective,only logical to project our product into thirsty Far Eastern markets with all possible speed: oil sitting in the ground does not earn us a cent.