We have a political environment that lacks credible independent commentators (e.g. Walter Cronkite), so anyone presenting themselves as independent who calls bullshit on a politico is immediately labeled as biased.
What mechanism do you think could overcome this and pull the mic plug to reduce the incentive to lie without immediately being vigorously attacked?
They will be vigorously attacked by the right regardless.
Telling the truth is simple. Conmen succeed only when people don’t tell the truth.
The corporate news media have painted themselves into a corner that only they can get themselves out of. They will need to make courageous choices, put the good of the country and public service first, and accept that a click-based-horserace is a horrible idea.
The corporate news media doesn't exist to put the good of the country and public service first, it exists to make money, and it's making a lot of money; they're not about to fix what isn't broken just because the country - and the world as a whole - is falling apart.