It's worth keeping in mind that state governments in the US also wield a lot of power and the gerrymandering at that level can be unbelievable (see "North Carol

It's worth keeping in mind that state governments in the US also wield a lot of power and the gerrymandering at that level can be unbelievable (see "North Carolina is no longer a democracy" recent stories). The state governments control how voting works in the state, which can lead to distortions at the federal level.