If trump does this it will be for no reason other than his pathological hatred of Obama. There is no reason to undo this. It's hateful and petty. We are talking about people who are in most cases taxpayers who know nothing about the countries they were born in. They are Americans. Already hated more than any president in history, trump is about to be even more hated. He won't make it through a single term. He's too polarizing and incompetent.