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To refresh your memory, he was a fairly liberal Tsar who came into power towards the end of the Crimean War. He made many strides and reforms, but was cut short by a bomb. It seems pretty clear that if he had survived, there would have been some sort of representative body in the government, probably similar to the first Duma.
So. I don't know much about the man besides the conventional wisdom, therefore I submit this POD to your general intellect, AH.com.