I don't want to even guess at the presidency. 2016 showed how futile guessing can be. But historically it would be extremely unlikely that the house would go to the same party holding the presidency on the prior term. The Democrats will hold (probably gain in) the house. I think they will also gain in the senate (same reason). If Biden wins the presidency I would expect the house and senate to swing the other way in 2022. If Trump wins, the Dems will keep gaining in the lower houses.