Thanks Helen and F1.
The use and access to the internet is supposed to make finding and verifying information easier, but human nature being what it is, we tend to seek out and find things that "confirm" what we already think.
That's true for people of all walks of life, as we will soon see during the conventions and election.
Confirmation bias.
Also, even though the internet gives us access to an incredible amount of sources for news, people tend to stick with the same
type of sources. For many all their news will be from right leaning or left leaning sites. It's hard for most people to break out of that bubble.