Bush got an advance copy of Radzinsky's book, scheduled for November publication. The article says Alexander II (Russian ruler from 1855 to 1881) freed 23 million Russian slaves in 1861, but "his governmental reforms ultimately were his undoing." The article's author makes much hay out of this.
Yeah, he was murdered by an extremist group of terrorists who didn't realize that Alexander II was the best hope for Russia's future. Instead, his assassination results in the ascension of Alexander III, a brutal reactionary who quashed any further reforms that might have been achieved. A constant theme in history is how great projects are ruined by those who do not understand them.