I don't know if this has always been the case but I can easily show that the "mainstream media" has a very strong right wing bent since, at least, the Iraq War. This right wing bent is so crazy that they even help, endorse or promote right wing lies and thus is worthy of comment. Cognitive dissonance, stupidity or bought? (All extracts are from Media Matters.org, an independent media research group)
Media Matters: Study: NY Times, Wash. Post quote more than twice as many Republicans as Democrats in political coverage
Throughout May and June, two of the nation’s leading newspapers, The New York Times and The Washington Post, quoted Republicans at more than twice the rate of Democrats in their political news coverage.
Media Matters: STUDY: NY Times, Wash. Post coverage of caravan plummets after midtermsNews stories referencing the caravan drop by more than half post-elections, front-page ones by more than two-thirds
Media Matters: In drawing equivalencies between white supremacists and antifa, media outlets obscure ideologies -- and impacts - White supremacists commit murders in pursuit of genocidal policies. Antifa throws punches. They're not the same, and media outlets should make that clear.
Media Matters: The media’s “civility” game helps TrumpThe Red Hen reaction shows how Trump benefits from backward media accountability
Media Matters: How The Press Never Stopped Blaming Obama For Radical GOP Obstruction
Media Matters: Why We Should Keep Using The Term “Fake News”
Media Matters: How Bret Stephens and Bari Weiss have taken the NY Times’ campus concern trolling to new heights in just 2 years The two were brought over from the WSJ to bring a bold new perspective to the paper. Instead, they’ve been amplifying its most played-out talking point.