The biggest problem with this is that the geography doesn't really make sense. A line from the east coast US to Europe goes right over Quebec which provides a l

The biggest problem with this is that the geography doesn't really make sense. A line from the east coast US to Europe goes right over Quebec which provides a large portion of the east coast's electricity through hydro already. Instead of spending billions on a trans-atlantic cable, you can just build a ton of renewables in the US and use Quebec's hydro as a giant battery.