So, yes, it has been determined through DNA that Warren Harding fathered a child with Nan Britton. Because no one believed her at the time and she received no child support she wrote a book, The President's Daughter, to try to raise some money. It was a best-seller. She writes about how he set her up in an apartment in Asbury Park, New Jersey and other intimate details about their life together. Going to be reading this book tonight on my Kindle.
The New York Times: DNA Is Said to Solve a Mystery of Warren Harding’s Love Life