Key here will be Georgia. It appears to be deadlocked, and if it goes blue it's game over for Trump. Atlanta Metro Area turnout will be key here.
In the Senate, watch GA and SC (both R-inc).

Bad ballot design led to a lot of undervotes for Bill Nelson in Broward Co., possibly even enough to cost him his Senate seat. They do appear to be real undervotes, though, instead of tabulation errors. He doesn't really seem to have a path to victory. https://t.co/utUhY2KTaR
— Nate Silver (@NateSilver538) November 16, 2018
Dear @realDonaldTrump
— Sidney Powell \U0001f1fa\U0001f1f8\u2b50\u2b50\u2b50 (@SidneyPowell1) December 23, 2020
#China and #Iran stole this election from the #American people
who voted for you in a world-record landslide!
We must expose all the corruption and restore the Republic now
There will never be a free and fair election if we don\u2019t end the rigging now \U0001f1fa\U0001f1f8 pic.twitter.com/2t707xN0ar