I have my own theory on this:

Remember when Trump moved into the White House and for many months had to have meetings outside the Oval Office because they had to strip all the walls to find listening devices? Just a hunch here that they're possibly doing the same, afraid that those horrible supporters of his have bugged the whole White House at this point. Yes, they are this paranoid I suspect. They probably fear that any moment the military may move in for them as well.

Another thought I have is that report from some time back where we heard rumors that Harris and Biden's staff are at each other's throats. The infighting could be so bad that they could be spying on each other.

Is Trump physically in the WH? Doubtful. Is he or military running things? I kinda have my doubts. I am reminded of a general store where I grew up that was part of a larger chain. The head office wanted to get rid of their satellite store so they put in person after person to run it. Finally after 3 really good managers they found the one that ran it into the ground giving them the justification to close it. Point is it would be smarter to actually let them run things because they're so grossly incompetent at this point they'll run things into the ground and when it finally collapses they'll move in at that time. That's probably what they fear right now as they fight each other.

But what a shitstorm it's going to be until then.