If we’d been doing an international encyclopedia, the British would have made some inroads at this point. After all, the British have flat-earther James McIntyre. They also have Gillian McKeith, who may not be a flat-earther, but given her general understanding of science might just as well have been.
But leave it to the Americans to come up with anyone as terminally insane as Cynthia McKinney. McKinney was a presidential nominee of the US Green Party in the 2008 U.S Presidential Elections (she did receive more votes than Ron Paul) and has long been a member of Congress representing Georgia. She lost her seat in Georgia in 2002, regained it, but lost it again in 2004 when she slugged a Capitol police officer. Alex Jones-style, McKinney believes more or less every conspiracy theory she has encountered.
A selection of claims McKinney has endorsed is that the US military shot and killed 5000 prisoners during Katrina and dumped their bodies, a multitude of 9/11 conspiracy theories (unsurprisingly), and that Jeb Bush was running a drug ring out of Columbia while he was governor of Florida. Conspiracy theories concerning famous assassinations endorsed by McKinney include believing that James Earl Ray did not kill Martin Luther King Jr., that Lee Harvey Oswald did not kill JFK, that Sirhan Sirhan did not kill Robert F. Kennedy, and – particularly vehemently – that Biggie did not kill Tupac.
The latter may or may not be the case, but part of the reason for McKinney losing her seat in 2002 was her obsession with the case and spending a little too much time and effort and governmental resources to deal with this question (she tried to pass a bill to release the government’s secret records on the murder).
Cracked.com lists her as the sixth most insane person who has ever run for president (I have a feeling the list may not be entirely complete).
Diagnosis: The Democrats' answer to Michele Bachmann, McKinney is really stunningly insane, and despite the good stuff she’s done, she is a real threat to sanity and society.