One of the websites The Washington Post labeled “fake news” in a November story demanded a retraction and threatened the paper with a defamation lawsuit in a demand letter Sunday. A lawyer for Naked Capitalism accuses WaPo of running a debunked list of “fake news” sites in the “sensational” story compiled by a dubious team of researchers, without substantiating their claims or giving Naked Capitalism a chance to respond to the allegation. The Washington Post’s actions constitute defamation, the lawyer writes in the letter published Monday. “You did not provide even a single example of ‘fake news’ allegedly distributed or...