JoeBiden/Instagram/Adam Schultz Former Vice President and presumptive Democratic presidential nominee Joe Biden announced Sen. Kamala Harris of California as his running mate on Tuesday. Biden's announcement also drew interest for other reasons, particularly after his campaign released a photo of the moment. The image revealed a framed comic, one that had a special meaning for the Democrat. Visit Business Insider's homepage for more stories. Former Vice President and presumptive Democratic presidential nominee Joe Biden announced Sen.