What is the difference between a country and an empire?
A country is a region legally identified as a distinct entity in political geography. An empire is a country that is actively expanding its influence or territory.
it simply depends on which is in office, democrat or republican...
A country is just one state while an empire is a group of countries under one ruler. Empires were most common in the ancient days. A good example is the Empire of Mali. Find some more info on http://africa.si.edu/exhibits/resources/mali/res.htm.