Democratic Sen. Barack Obama, who has made his opposition to the Iraq war a linchpin of his campaign, is distantly related not only to U.S. President George W. Bush but also to another wartime leader — former British Prime Minister Winston Churchill.

McCain, it turns out, is a sixth cousin of First Lady Laura Bush.

Meanwhile, Sen. Hillary Clinton, is related to beatnik author Jack Kerouac, Canadian Prime Minster Pierre Trudeau and Camilla Parker-Bowles, wife of Prince Charles of England.

Clinton also shares ancestors with Grammy Award-winning singers Celine Dion and Madonna.

Clinton, the Society said, is related to Angelina Jolie. And Obama is related to Jolie's boyfriend Brad Pitt.