It doesn't matter. There are plenty of very red districts in swing states. Here's an example -
Connecticut District 32 (very very red) :
Nov 68R 32D, special election this month 55R 45D
The last time democrats did that well in this district was 40 years ago.
Its too soon to fully tell but all the people in this thread completely writing the democrats off right now are delusional if they think its going to be some sort of republican landslide, particularly when all the signs point to a very activated democratic voter base.