SJB:

 

Unless the Dems can control the Senate his administration can achieve very little. And in that case if he's still alive in 4 years time I doubt he would win a second term so the US will swing back to Republican again with another Trumpian style leader. Back to square one.

 

There's a chance they can with run-off election in Ga in January.  VP casts a deciding vote, so 50:50 is a majority to the Dems.

Anyway, I don't think it's as dire as suggested unless all Republican senators behave as they did when Trump was POTUS.  There are quite a few Senate seats coming up in 2022 - see how it pans out and how many are continuing to stand by "Trumpism" or whether it will dry up and blow away in the wind like a dog turd in the summer sun.