Since WikiLeaks began releasing once-private messages from Hillary Clinton campaign chief John Podesta, the world has had even more access to hard evidence of the mainstream media’s support for and collusion with Democratic Party operatives and campaigns. The latest example, reported now for the very first time (as are we can tell), shows CNBC’s Rebecca Quick — the co-host of the channel’s popular show Squawk Box and a co-moderator with John Harwood at a 2015 Republican primary debate — promising to support Sylvia Mathews Burwell, who had just been named the secretary of the Department of Health and Human Services....