I think the Democrats will win taking over both the Congress and the Senate in the process.
The mid term elections showed a trend to that direction as well.
Trump has suffered too many hits in his term as president, add in the recent pandemic and racial unrest problems and you have population looking for resolve and answers from their chief public representative .
I dont think the democrats have put up a candidate that will overwhelm the election either. Biden just doesn't have the vigor and articulation than a younger candidate would have, might be his actual age, might be to the fact that he's been in politics for a long time now.