Cynthia McKinney was one of the looniest Democrats of her generation. A 9/11 Truther, she lost not one but two Democratic primaries because she was considered too far out. Her father’s explanation that she was in trouble because “the Jews have bought everybody. J-E-W-S” added to her legend. After her second primary rebuff, McKinney left the Democratic Party. She was the Green Party candidate for president in 2008–which tells you all you need to know about the Greens–and got 0.12% of the vote, mostly, one assumes, from nearsighted voters who checked the wrong box.McKinney, testifying to US war crimes in...