Napoleon didn't save France; he just took over the country, set himself up as a dictator (later Emperor), and proceeded to waste the lives of millions of Frenchmen by trying conquer pretty much all of Europe for nearly two decades until he had virtually exhausted the country militarily and economically. Yes he did some positive things in that time, but overall it's hard to see his long-term career as anything other than one of military and political disaster for France. Not that Trump likely knows or cares about any of that, of course.