Financial Times: CNN is enjoying a ratings resurgence, thanks to a shift in focus, programming changes and the rise of Donald Trump. Chief Jeff Zucker is pleased that steps to revive the Time Warner-owned network, taken since his appointment three-and-a-half years ago, seem to be paying off. CNN’s audience share has increased from 20 percent of the total cable news audience in 2012 to close to 30 percent in 2016.