I check 538 daily for this, Nate Silver really knows his job.
https://projects.fivethirtyeight.com/trump-approval-ratings/
I think we've now reached a point where only the base is left to nibble at. Progress will be slow from now on and drops minimal. It may even stop altogether somewhere around 30% or so, maybe lower. But every percentage point right now is a significant blow, because it comes from an already depleted and disenchanted electorate.
Gerrymandering is a double edged sword. It could be that the approach that gave Republicans over-representation will now result in them getting notably less seats that they would obtain in a proportional system.
McHrozni