At 4:20 p.m. on Dec. 28, 2020, he sent an email that has been a central mystery in the Clark episode. The email to Clark, obtained by The Post, has the subject line, “email to you,” and an attachment titled “Draft Letter JBC 12 28 20.docx.” The email text simply said “Attached.” The attached letter, which has been previously released, was titled “Pre-Decisional & Deliberative/Attorney-Client or Legal Work Product – Georgia Proof of Concept.”