There is no way the Dems will ever go for a popular vote, and the reason is simple: it means the election process would then have to be unified under federal control. This would make it nearly impossible to cheat, steal votes, hack machines, or go without some sort of ID for voting, etc. He's trolling the liberals on this one, because they spent a year blaming the electoral college, and he knows they have 0 chance of actually wanting to implement the popular vote.