From CNN via Red State:Yes, you read that right. He also endorsed Ralph Nader, who is to the left of Barack Obama.
Paul, who unsuccessfully sought the Republican presidential nomination, will tell supporters he is not endorsing GOP nominee John McCain or Democratic nominee Barack Obama, and will instead give his seal of approval to four candidates: Green Party nominee Cynthia McKinney, Libertarian Party nominee Bob Barr, independent candidate Ralph Nader, and Constitution Party candidate Chuck Baldwin, according to a senior Paul aide.
McKinney is known for her vehement support for the Palestinian cause and participated in a few flotillas intended to block the Israeli blockade of Gaza.
h/t Weasel Zippers