Not yet. Getting rid of Trump will still be the ultimate motivator. Someone else said it but hate truly is a better motivator than support is. Trump may very well learn that lesson too. As such; after 2020 though, if they are successful, we might see a repeat of how elections went during the Obama years. Democrats should never ever get complacent ever again, but they probably will regardless. Our politics may seem volatile, but it also tends to be fairly repetitious.
This (bolded). The reason why there has been such a surge of Democratic candidates running for the House this year has been because of contempt for Trump. That contempt is going to be sustained. Don't forget too that Republicans will likely keep the Senate, and they've certainly got a firm grip on the Supreme Court.