FILE - In this 1939 file photo, Nan Britton. DNA testing is rewriting a chapter in presidential history, this one from the Roaring '20s. AncestryDNA, a division of Ancestry.com, says genetic analysis has confirmed President Warren G. Harding fathered a child out of wedlock with his long-rumored mistress Nan Britton. She set off a scandal when she went public nearly 90 years ago with her tale of forbidden love in the White House. (AP Photo, File)