CNN vs. Fox News 2018 based on
Google search trends
Big Think: Maps show how CNN lost America to Fox News - Frank Jacobs explores some small multiples! Among the conclusions: "Map details dramatic shift from CNN to Fox News over 10-year period."
Medium: A Gratuitous Rundown of More Than Three Decades of Gratuitously Cartographic Advertisements in Fortune Magazine - Tim Wallace has a look at them from the 1930s through 1962.