Sadly, I don't think she will ever actually be prosecuted (as a former First Lady), but maybe she could still fill a symbolic role in the storm being taken en passant ... removed from any possibility of Queening ... removed from blocking for other pieces.
In the short run, such a move would suck 100% of the oxygen out of the RAT convention and their pre-recorded speeches.
Pardoning Hitlery would be the worst move he could make and I am not the least worried that is who it will be.
We were promised “lock her up” and even if we don’t get that (we still might) his base would take it as the ultimate betrayal if he pardoned her.
I have had trolls on other sites suggest it will be her, the TDS victims would have a field day.