Well, first question. Is/was Saddam a complete fool? If your answer if yes, then proceed to the next question. If your answer is no, then you have no reason to worry because he would not be any threat to America.
2nd question. Would Saddam, being mildly competant, desire to maintain power, or to lose power? If yes, proceed. If no, again, no worries here because he would pose no threat.
3rd question. Would nuking America leave Saddam alive, in power, or healthy? If yes, then you are a complete moron. If no, then why what does he accomplish by nuking America? Death?
So, I suppose that I can assume what Saddam would do. He would NOT nuke America. He would position himself in a way so that he might could attack other countries while preventing America from entering the fray due to alliances and world views, but he would NOT simply throw a nuke in our direction. That is bad for survival. We would see natural selection in action.