Tuesday night's exchanges on energy between President Obama and Governor Romney never touched on that point -- but its oddly crucial in understanding the Romney "energy independence for North America" plan.
The ad presents an image of the tar sands that looks more like a scene from The Sound of Music than the environmental crime scene that big oil corporations are actually perpetrating.
Tomorrow President Obama is traveling to Canada. Prime Minister Harper wants to discuss giving Canada's dirty tar sands fuel a pass from greenhouse gas limits.