Legitimate studies by foundations and universities show that fox news is highly inaccurate and that those who obtain their "news" from fox actually know less than those who totally ignore all news sources.
The most informed get their news from NPR. Even those who list The Daily Show as their top news source are ahead of people who get their news from mass media.
And mass media truly is mass. If I remember the numbers correctly, six corporations own more than 85% of all news outlets.
The only liberal media is underground.
And the United States is being dumbed down, a process that began with No Child Left Behind and continued with the merging of various media outlets.
More than 50% of all Americans read on the 8th grade level according to Scholastic, the children's book publisher and the promoters of book fairs. Conservative parents are much less likely to read to their children than liberal parents, which means their children start school with a disadvantage.
31% of college graduates only read on the 8th grade level as well. And the mean IQ in the US is no longer 100 but 95.