On Monday evening, Chris Wallace, the veteran newsman, CNN anchor, and ultimate Washington establishmentarian, called the network’s talent chief Amy Entelis to inform her that he intended to leave at the end of his contract. Minutes later, to the consternation of his bosses and presumably their P.R. department, he gave a reporter at The Daily Beast the green light to publish a precooked exclusive about his departure. The piece asserted that the 77-year-old broadcaster was walking away from a seven-figure contract to find a new home in “streaming or podcasting,” which, as Wallace told the reporter, is “where the action seems to be.”