Please assume Ohio.

Clearly, it is repeated on here many places that wrongful termination only applies to discrimination protected by law (such as sex, race and age), but I was wondering, under the doctrine of at-will employment, can your boss safely fire you for not breaking the law, a local/state/federal regulation or some other government mandated policy?

For example, say your boss told you he needed to get downtown quick. You got in the company car, and your boss told you to speed. You refused. Your boss missed his meeting, lost a big account and fired you the next day and even gave you a termination letter, referring to your "failure" the day before to deliver him to his meeting on time as the reason you were fired. Do you have a good chance of winning a wrongful termination suit?

If there is any protection for such a termination, how deep does that protection go? In other words, if federal law trumps the at-will doctrine
what about a county ordinance, what about an order from the company president to do something that would make you personally liable to a third party in a civil matter?