Because Ukraine doesn’t have an Electoral College, Russians in its eastern provinces, where they controlled election systems, were able to grind out enough ballots to swamp the rest of the country and elect a Russian puppet as President.

The purpose of National Popular Vote is to permit the Democrats to use their control of California to dominate the other 49 states. Currently, the Democrats can grind out as many ballots in California as they want, but it wouldn’t do them any good: they would still get the same number of electoral votes. This is exactly what happened in 2016.