See: https://www.washingtonpost.com/news/monkey-cage/wp/2017/02/0...

Because of strong media polarization in the cable television news sector, coverage -- while it will show up on both sides of the fence -- will be prioritized to one topic or another entirely depending on politics. So MSNBC spent a huge amount more time exploring the Access Hollywood tapes / Russian hacking angle regarding Trump, while Fox News will cover Clinton's email scandal more.

This is not exactly surprising. I wouldn't call this "corruption". Having an opinion / bias is not corruption.

I will say that from a personal perspective, I find all of American cable news fairly awful, and one of the reasons is this "gotcha" fatigue when it comes to their outrage cycles. At some point, it's hard to figure out what is really a genuine fault and what is just some tabloid fluff designed to get the viewer demographic angry. This especially applies to the "gotchas" that devolve into outright wild conspiracy, such as the Podesta emails you reference (devolved into Pizzagate and who knows what else).

Although not my primary news source, my impression is that Reuters is much more sober than the current state of cable news.