Complex sentence: Meyer replied that in fact the states had power and even caused a Civil War, which was more accurately labeled as a war between the states, but Jaffa was correct that states mostly had to exercise it themselves rather than rely upon national officials.
Split into simpler sentences: Meyer replied that in fact the states had power and even caused a Civil War, which was more accurately labeled as a war between the states. But Jaffa was correct that states mostly had to exercise it themselves rather than rely upon national officials.