U.S. refiners are eager to buy Canadian heavy crude to replace supplies they had been importing from Venezuela that are now blocked by Trump administration sanctions.
But there's not enough space on pipelines and trains to get it across the border.
TransCanada Corp.'s proposed Keystone XL pipeline could have been the answer. However it's no closer to being built than when President Donald Trump tried to jump-start it with a presidential memo signed in front of a crush of cameras on his fourth day in office.