Cooper said it was "fascinating" that it appeared these Democrats-- when backed into a corner-- are using their rendition of the "Republican" call of "fake news." Cooper told a post-debate panel that Democrats call these questions a "Republican talking point."
CNN senior political reporter Nia-Malika Henderson agreed, adding that it's sometimes actually a "Democratic voter talking point."
Cooper continued, "Even if it is a Republican talking point, you're going to be debating a Republican and if you can't answer..."
One of the candidates who most notably used the "Republican talking point" line was Sen. Elizabeth Warren, D-Mass., during a fiery exchange with former congressman John Delaney over Medicare-for-all.