Hillary Clinton will attend a fundraiser in New York on Tuesday hosted by Facebook millionaire and vertically integrated media company caretaker Chris Hughes, who recently described himself in a Vanity Fair profile as “the Antichrist, or something pretty close to it.” Hughes is best known for being Mark Zuckerberg’s roommate at Harvard and for pioneering the “poke” button feature on the popular social media website Facebook. His husband, Brown graduate Sean Eldridge, was the worst candidate of the 2014 election cycle. Eldridge ran for Congress in New York’s 19th Congressional district after Hughes bought him a mansion there. He ended...