At the Iowa Debate, Bernie Sanders' Most Vociferous Opponent Was CNN

AHEAD OF THE August 2015 Fox News debate, the company’s chair, Rupert Murdoch, issued a directive to debate moderator Megyn Kelly: The Donald Trump thing has gone on long enough, it’s time to take him down. Kelly took a bat to candidate Trump, listing off his most misogynistic remarks, asking how he could explain them to voters. But Trump ended up winning that war.

Democrats assembled in Iowa Tuesday night for the opportunity to take him on in the upcoming general election. This time, though, it was CNN moderators who...