OTOH, results of elections to congress (house of representatives) looks balanced - total seats gained by each party matches popular vote with deviation < 1%. Which is much better than i expected considering single-seat system leads to advantages for dominant players even without gerrymandering.
Even in my home country, which is european country with proportional system and no gerrymandering, such deviation is higher (< 2%) due to rounding effects.
Gerrymandering is main issue in (some) state elections (e.g. Wisconsin 2018 is egregious example), not federal elections.
The totals are a little misleading because there is partisan gerrymandering on both sides, so they somewhat balance each other out. Courts have also been highly involved in rejecting the most brazenly disproportionate maps, but that may soon change next year due to the newly constituted Supreme Court.
The bigger problem is that it incentivizes partisanship and extremist views in uncompetitive districts because the representative is effectively decided in the party’s primary election, not the general election which has higher turnout and a more representative electorate.
Also the fact that 90%+ of congressional seats are safe except for the occasional primary opponent discourages accountability. Our districts are so distorted, they make no geographic sense. And it means a large percentage of our population is permanently disenfranchised, which dampens voter participation. It really is one of the biggest structural problems of our democracy right now.
Even in my home country, which is european country with proportional system and no gerrymandering, such deviation is higher (< 2%) due to rounding effects.
Gerrymandering is main issue in (some) state elections (e.g. Wisconsin 2018 is egregious example), not federal elections.