In discussing journalistic objectivity, [press critic Jay] Rosen agrees that the media’s work should not be politicized, i.e., produced expressly to help one party/candidate or another.

On the other hand, he says, media cannot help but be political. Modern journalism was meant to play a political role, to expose the truth and hold politicians accountable to the small-l liberal values that make liberal democracy possible. It cannot remain neutral when those values are under threat. Like other institutions — science, the academy, and the US government itself — its very purpose is to both exemplify and defend those values. Its work is impossible without them.

The press should always be fair in the application of its values and standards, but doing so will mean making clear when there is an asymmetry.

David Roberts on objectivity.