I was not particularly thinking about the Russian Revolution. On the "scourge of humanity" side, there's always Hitler, who was popularly elected multiple time

I was not particularly thinking about the Russian Revolution. On the "scourge of humanity" side, there's always Hitler, who was popularly elected multiple times. On the scoundrel side, there are folks like Nixon. Every U.S. president since 1960 has also presided over a lot of death and misery, and propped up "friendly" dictators in various global locales, plus a huge proliferation in armaments, often as part of proxy battles in the Cold War.