The biggest loser of CNBC’s Republican Presidential debate last week was the news media. Ted Cruz got the loudest applause of the night when he slammed the moderators for asking questions he considered anti-Republican, saying, “The questions asked in this debate illustrate why the American people don’t trust the media.”

The line thrilled conservatives, as Republican pollster Frank Luntz described on Twitter.

And the thing is, conservatives have a point. Study after study has shown that the mainstream media leans left, and that, as economists Tim Groseclose and Jeff Milyo have written, “an almost overwhelming fraction of journalists are liberal.” The extent of this bias, of course, depends on what your definitions of liberal and conservative. And the media has other, arguably more important, biases: towards controversy and producing content that is profitable. But it is safe to say that the median journalist in America is to the left of the median American voter, and that this affects how the news is presented to the public.