Neither party wants it so far. We lost the election in 2000 because of the EC. The Democrats need to push for abolition of the EC. I predict Trump will be a one term president and that in 2020 the presidency, the House and the Congress will go to the Democrats, and then we can get rid of the EC, as we should have done 40 or more years ago.
It would require a constitutional amendment.
It would recieve popular support, but with Republicans being strategically advantaged by it, they would oppose it. If the amendment process got underway, they would just make a state rights argument.
There isn't any possible "states' rights" argument.
What it means in effect is that anybody who lives in a state that isn't close is disenfranchised. If you live in California your votes are going to the Democrat; if you live in Texas they're going to the Republican. That's true whether you vote with the state, vote against the state, or stay home and don't vote at all. They all have the same effect; your individual vote means absolutely NOTHING.
And that discourages voting, because what's the point. And that's bad for democracy.
Simple as that.