QUOTE : niche information.” When I was a teenager, cable TV didn’t exist; the first TV program of any sort didn’t come to my city of Boston until 1948; and for years thereafter, we Americans got our news from just three big TV networks, three major weekly newsmagazines, and newspapers. Most Americans shared those same sources of information, none of which was clearly identified with conservative or liberal views, and none of which slanted its information heavily. Now, with the rise of cable TV, news websites, and Facebook, and with the decline of broad-market weekly print newsmagazines, Americans choose their source of information according to their pre-existing views.