Nick Bilton of Vanity Fair writes of indications that Facebook’s Mark Zuckerberg will run for president of the U.S. someday. Among the lesser bits of circumstantial evidence: Zuckerberg, who has a habit of posting his annual New Year’s resolution on his Facebook page, declared that after conquering the previous challenges of learning Mandarin, and building an artificial-intelligence butler for his home, this year he was going to meet “people in every state in the US.”