Most people aren't tuning to the "mainstream media". The average audience member of CNN or Fox News are literally 60+ years old and few actually read newspapers or anything. Most people get their information from social media, and polls show that trust in mass media is at an all time low anymore. Only about 1 in 4 people even identify as a Democrat too, so even if 100% of them could be tricked into supporting Bush, we still have them out numbered by a wide margin.