Answer:
With cell phones and news websites, media has become incredibly easy to get acess to compared to what it used to be. People may see biased new sources and rely on them for their information, they now only have one side of the story. For example if John sees an article about how great Trump has done since 2016 he may start supporting Trump. But is Sal sees an article about how useless Trump has been Sal may dislike Trump.
(hope this helped)