This is the same phenomenon we've frequently seen over the last fifty years with large big-city newspapers as well, whether owned by Jews or non-Jews. The New York Times was considered a "Republican" newspaper until the 1960s, believe it or not. The New York Daily News was considered "conservative" until it was bought by Zuckerman. (Before then, they had been owned by the Tribune Corporation, whose flagship newspaper, the Chicago Tribune, was - until new ownership came in sometime in the 1070s(?) - also considered "right-wing.")
This phenomenon of a general shift to the left in the American newspaper industry is one reason for the industry's decline over the years.
The same can be said for the major television networks and the magazine industry.