The news sections are always biased, if only by what they cover. For example, the New York Times, until the past month or so, was constantly running news stories about Hillary Clinton's chances in the general election against various Republicans. However, they obviously betray a bias since they considered all of the Republicans running, and only one of the Democrats. (Curiously, they started running more serious articles about Sanders only after it became clear he wasn't going to win the nomination.)