Sunday evening, the New York Daily News took the unusual step of publishing a statement in which a 21-year-old college student from Seattle denied being the mistress of Rep. Anthony Weiner (D-NY). Gennette Cordova said she had never even met the congressman, explaining that an April message on her Twitter account describing Weiner as her "boyfriend" was intended as a joke. Yet it was not what Cordova said on Twitter that made her statement so newsworthy. Rather, it was what was sent to her late Friday night from the congressman's Twitter account: a link to a photo showing the crotch...