This seems sort of speculative to me - at least too speculative to base (important) policy on. The way the US government would be likely to handle this situati

This seems sort of speculative to me - at least too speculative to base (important) policy on. The way the US government would be likely to handle this situation is that they would recognize the threat and mandate that no such single database be created or that one be separated were it to exist. I don't know that they would change their mind about backdooring products and services when they can mitigate the scenario and address concerns a much easier way.