https://www.washingtonpost.com/news...epublicans-nationwide/?utm_term=.6402065d6e67
Could we finally be on the verge of an end to Gerrymandering?
Everyone knows that Gerrymandering happens, and the courts have long said that it violates the constitution, but the problem forever has been how to prove that districts have been intentionally Gerrymandered in a consistent way that would make banning Gerrymandering possible. How can we enforce a law requiring districts to be drawn fairly?
The answer may finally have been found. It's called voter efficiency. Essentially it's the the number of votes that each party wasted in an election. Votes that did not help their party win an election at all. A vote is considered wasted if it is cast in a losing election, or if it's a surplus vote in a winning election. Since the goal of good gerrymandering is to insure that your party wins a high number of seats by a relatively low margin whereas your opponent only wins a very small number of seats, but with a huge margin. We can calculate how badly a state is gerrymandered based upon the discrepancy between the wasted votes for one party versus the other.
Right now there are 15 states who's efficiency gap exceeds 7% which is the margin by which the party with the advantage can be certain to maintain it's advantage from one election to the next. Out of those 15 states only two favor Democrats. If this decision is upheld and it is entirely possible that all of those states could be forced to redraw their districts before the 2018 election.