This is a weak argument. The logistics of it are impossible , even if the premise is true, except over the course of decades. A sudden shock of the influx of this many voters would drive many, including the real Democrat building blocks of unions and blacks the other way. Plus, the calculation, if it has any reality, is being made by the same Democrat leaders who thought the body politic was going to reward and support the universal healthcare plan enthusiastically. Obama's charisma was the big shiny bauble that was supposed to attract everybody, and it is being busted.
What we need now is RecordsGate to expose this. The records are there, if we can expose them. Then and only then is there a peaceful path to conclusion.