On May 18, the Oregon House passed HB 3475, the National Popular Vote Plan for presidential elections. The vote was 37-21. This is the first National Popular Vote Plan bill that has made any headway in 2015. Now the bill goes to the Senate Committee.
What happens if the National Popular Vote bill is enacted by states which currently have more than two hundred and seventy electors among them, but the after a census the number of electors is reallocated and those states no longer have more than two hundred and seventy electoral votes?
The bill would be in effect when enacted by states possessing a majority of Electoral College votes—that is, enough to elect a President (270 of 538). If the total electoral votes of the enacting states would become less than 270 it would not be in effect, until/unless enacting states again had at least 270.