Jeffrey A. Zucker, the president of CNN who reshaped the cable network and America’s news media over the last decade, said during a morning call with CNN staff members on Thursday that he planned to step down at the end of the year, when his contract is up.“I cannot imagine not being here right now,” Mr. Zucker, 55, said, according to a CNN staff member who was on the call. “I’m going to stay and finish my current contract, which, as I said, will keep me here until the end of this year. At that point, I do …
