Did you read what I wrote? That's not true of the National Popular Vote. Legislators in a plurality of states can alter the election for President (and so fundamentally shift the nature of national politics) without any cooperation from the President or any Federal official.
 Or rather, a number of states comprising a plurality of electors.
The system that puts legislators into place is a local majority vote, which is just as flawed as a national majority vote. It leads to a 2-party system which concentrates power and typically results in corruption.
Local majority vote --> Two-party system
National majority vote --> Two-party system
National majority vote <--> Two-party system
Two-party system --> National majority vote