You may also recall that New York had a real saga when it came to redistricting. The Democrats in the state Legislature drew a map that a court ruled was an extreme partisan gerrymander and struck down. The state court then appointed a neutral expert to draw a new, fair map, which is what was used for this election. Basically, the Democrats got a bit greedy, and instead of getting to draw a modestly favorable map, like a lot of other state legislatures did, the Democrats were stuck with a much more neutral map, which made it fertile ground for GOP gains in a midterm year.
