[arcane]

I didn't click on your source, but it sounds like an introduction to the book, The Shadow of Blooming Grove, the definitive biography of Harding. The "Shadow" referred to in the title is the suspicion that Harding was partly black. Harding, indeed, may have been our "first black president."

[mountaineer]

I just did a google search and found that snippet, so I wasn't familiar with the source, but had remembered from other sources Harding's womanizing and out-of-wedlock child (very Clintonian!)