elections used to be closer on the district-by-district level
Alternate explanation for part of this effect: the losers in gerrymandering will lose whatever barely-dominant districts they had, in exchanges for a mix of fewer strongly dominant (nearly unanimous) ones, and barely-losing (45%-55%) ones.
Alternate explanation for part of this effect: the losers in gerrymandering will lose whatever barely-dominant districts they had, in exchanges for a mix of fewer strongly dominant (nearly unanimous) ones, and barely-losing (45%-55%) ones.