True, there are partisan lackeys in the MSM. But I fear that's not the major source of their lack of concern, nor of our disastrous (& likely suicidal) national politics.
The MSM merely wants to sell papers. (Follow the money.) The public at large has little interest in government (unless it involves a sex scandal). Thus the MSM isn't going to waste much page space on stuff their audience doesn't care about. (And yes, this is a vicious circle, where the uninformed aren't "bothered" with information, and thus remain ever more uninformed.)
Probably 80%+ of our population never watches a newscast or reads a paper. And news *magazines* died at least a decade ago. But they are insistent on their right to vote -- even if they are clueless. And thus we get government by which ever demagogue (backed by corrupt vested interests) is most successful at waving the bloody shirt / at agitating the mob to (cluelessly) vote.
(Note that so many of the groups that supported Obama have been injured by his policies -- most egregiously, young people, who've been robbed of their future. But they consider it a burden to know anything about any of this, and thus -- pie-eyed & gullible -- they still defend his predations.)