Was there some report that Bush lied about having scheduled guests in the Blair House or something?
Apparently only in the head of the lonestarnut primitive.
As another primitive mentioned, it's tradition that the incoming president and family move there five days before the inauguration, in this case January 15, and so there wasn't ever any problem with that.
But as for guests before that time, it's probably a pretty deeply-set precedent that the then-current president can pick-and-choose who's going to be there, as I'm sure the Impeached One, the Incompetent One, Lyndon Johnson, and Harry Truman did, and if the then-current president doesn't want anybody there, it's his prerogative.
The lonestarnut primitive was just looking for a reason, no matter how stupid or silly or trivial, to vent her Hate.