They were talking about this when Bush won in 2000. Because Gore won the popular vote. The reason they haven't done it is because it would knock out all but, like said, 14 states. I don't agree with the popular vote. All legal citizens should be involved in it. So the delegate votes are here to stay. There is no way that the SCOTUS would make it popular vote, as if it was tried by the dems, you would see all 52 states filing lawsuits.
If you look, it is the dems who are trying to push it. And if you look right now, obama is ahead pretty good according to the popular vote.
Edited because I can't spell.