Yes indeed, there has always been "Partizan Politics" in reporting. In the early 1860s around 100 people, mostly Newspaper Editors were Jailed, without trial or facing their accusers, just Locked Up because they dared to print articles contrary to Lincoln's politics.

It Tombstone AZ there was two newspapers, One ran editorials favorable to the Earps, the other favored the "Cowboys". Problem today is we no longer get "Two-Sided" editorials or TV coverage, it's at least 95% One-Sided.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra