In any event, changing to electoral votes by CD would completely blow up in Republicans' faces. They've already proven perfectly capable of disenfranchising voters in less risky ways such as voter ID laws, having activist judges gut legislation that protects voter's rights and make it easier for people to vote, having those same activist judges rubber-stamp their racial gerrymanders, blocking any legislation that would make it easier for groups that aren't solidly Republican to vote, etc.
The only place worth considering is Michigan.
Your concern for the integrity and legitimacy of the democratic process is an inspiration to us all
If you're a Krazenesque Republican hack whose political short-sightedness is matched only by his shameless lack of respect for the democratic process than I guess I can see why this idea might appeal to you.