David Dodson, a TransCanada spokesman, said Bishop is incorrect. Dodson said all the oil currently in Cushing likely came from U.S. operations, though it's possible a small amount of Canadian oil could be there too. However, if President Barack Obama approves the Keystone XL pipeline — an 830,000 barrel-a-day pipeline that would run from Alberta, Canada to the Texas coast — then Cushing would get a lot Canadian diluted bitumen, the heavy black viscous oil from the bituminous sands, or tar sands, Dodson said. That bitumen is crude oil, Dodson said.