Barack Obama
Obama is a ninth cousin of actor Brad Pitt, linked by Edwin Hickman, who died in Virginia in 1769.
Obama and President Bush are 10th cousins, once removed, linked by Samuel Hinkley of Cape Cod, who died in 1662.
Obama has a prolific presidential lineage that features Democrats and Republicans. His distant cousins include President George W. Bush and his father, George H.W. Bush, Gerald Ford, Lyndon B. Johnson, Harry S. Truman and James Madison. Other Obama cousins include Vice President Dick Cheney, British Prime Minister Winston Churchill and Civil War Gen. Robert E. Lee.
Obama is the son of a white woman from Kansas and a black man from Kenya.
Hillary Rodham Clinton
Clinton is related to Pitt's girlfriend, Angelina Jolie. They are ninth cousins, twice removed, both related to Jean Cusson, who died in St. Sulpice, Quebec, in 1718.
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Clinton, who is of French Canadian descent on her mother's side, is also a distant cousin of singers Madonna, Celine Dion and Alanis Morissette.
Clinton's distant cousins include beatnik author Jack Kerouac and Camilla Parker-Bowles, wife of Prince Charles of England.
John McCain
McCain is a sixth cousin of first lady Laura Bush. McCain's ancestry was more difficult to trace because records on his relatives were not as complete as records for the families of Obama and Clinton.
— The Associated Press