The CBS Evening News anchor is very likely to leave in June and Scott Pelley is a top contender to replace her but CBS is looking both within and outside the network, Howard Kurtz reports. The search is on for Katie Couric’s successor. The new CBS News chairman, Jeff Fager, is looking at candidates both within and outside the network, insiders say. One strong contender if Couric vacates the anchor chair in early June, as now seems almost certain, is veteran newsman Scott Pelley. The 60 Minutes correspondent has long been a favorite of Fager, who doubles as the show’s...