I am sure Sarah is watching the debates and learning what she needs to know about the field of candidates when she does debate them.
If she does join them, I am sure she will surpise them as much as Michelle did. I’ve only seen one instance of her debating and that was the three cornered one during the gubernatorial race. She tended to sit back and listen to the others, which is an advantage. Most of us are so full of our argument that we don’t listen. We are too eager to get our “message” out.