No, actually, we don't. If you are including "hypothetical future sources" which it seems you are, then Canada and EU can get everything they need from places other than the US. The only one thing that the US has that the world needs is GPUs, but even then maybe we could make a deal and get lesser but workable ones from China.
Also no, Canada and the EU do not generally do a lot of trade with brutal dictatorships, unless you're trying to include the US in that category. At this point I have to assume you're a troll account.