Chris Licht, the producer who created “Morning Joe,” revamped “CBS This Morning” and revitalized “The Late Show with Stephen Colbert,” has been selected to run CNN once Discovery merges with WarnerMedia this spring, according to three sources with knowledge of the plan. The parties involved have not yet commented on the anticipated appointment. But Licht’s hiring will be announced next week, one of the sources said. Licht is currently the executive producer and showrunner of “The Late Show” and executive vice president of special programming at ViacomCBS, consulting on programming across the company. Licht has more than two decades of...