TheWrap: Under NBC News-MSNBC chief Andrew Lack, who took over in April, NBC News president Deborah Turness’ influence has been significantly diminished as the new top boss tries to break down the walls between NBC and MSNBC, according to an insider. “Andy has taken the reigns and allowed Deborah to stay as long as she’d like,” the insider said, adding that Lack isn’t imminently trying to oust her, but isn’t exactly pleading for her take on big decisions.