Tim Pickering was interviewed by Mike Eppel on 680 News Canada.
About 4 million barrels of Canadian Crude Oil are exported from Alberta to the United States every day. While President Trump has suggested the US doesn’t need anything from Canada, he ignores the fact that Canada is the largest source of Crude imports (do they really want more from Venezuela, Russia or the Middle East?).
Trump tariffs could affect heavy oil differentials (currently -$12 to -$14 see here via the Canadian Crude Index), some say by as much 5-$15/b....but this simply is "the art of the deal". Alberta Premier Danielle Smith is smarter than that.
To hear more, download the MP3 audio recording here.