The major banks of nearly every country are so spliced into each other and esp. the U.S. and largest Euro nations, that they cannot refuse such a demand. I have no doubt at all that if the Fed govt of Canada was still run by a leader like Pierre Trudeau, he would have had the balls and brains to tell the U.S. to F.O.
You cannot imagine what a bully the u.s. is under every admin. It mandated all other countries to halt bzns and all banking and finance with Cuba for its own embargo - to stall them getting ahead of the u.s. there - and did massively punish some minor businesses who violated it in Canada and other places. But now, hey, forget all that as long as the u.s. can rush back in.
Consider the years of conflict because Singapore did not want chewing gum in its own nation partly because it was jamming the doors of the new subway system & ruining the floors of the newest and most beautiful airline terminal in the world. Ballsy Lee of Singapore would not back down to Goliath & it went on for decades. Then, the u.s wanted a free trade agreement with S., and it was near signing, when Wrigleys chewing gum of Chicago told Geo. Bush not to do it, threw some money his way, and BANG, no treaty - stalled for yrs. Then, Lee & his people said they had wanted to get in stop-smoking gum for years, so they passed a law saying that gum could be allowed if prescribed by an M.D. Victory for Singapore - David beats Goliath. How much $ do you suppose Wrigleys could possibly sell a small Asian island nation per year ? $1m, 3m, and yet because the U.S. does this crap every day, around the world, aggression, push, shove, threaten, punish, isolate, etc. they do it even to overrule the legit desire of a friendly sovereign nation. Sickening.