This may be part of the reason....but have you checked the amount of rail cars that are transporting crude.....by
Burlington Northern that is owned by Buffet...Berkshire Hathaway..they own a subsidiary that builds rail cars and Burlington Northern also owned by Berkshire Hathawsy has significantly increased its lot of rail cars along with its transporting of rail cars.....

I believe that Buffet also donated a significant amount of money to Obama election.....

My theory on the rest of the story....of why Keystone Pipeline has not been approved by POTUS....

Spain over Brazil in the final.