Variety: The search for Jon Stewart’s successor appears to be intensifying. With several obvious candidates for Stewart’s “Daily Show” seat ruling themselves out, the likelihood is growing that Comedy Central will have to give stronger consideration to an external applicant. The looming choice is crucial for execs at the Viacom-owned network. Stewart is viewed as a Walter Cronkite of sorts by a rising generation. His program has been a linchpin of the network’s schedule.