Despite Tapper and Cuomo’s denials, CNN has been plagued by errors in its reporting on the Russia investigation. CNN issued a massive correction Dec. 7, 2017, to a story that claimed Donald Trump Jr. had been sent an email Sept. 4, 2016, that contained undisclosed information from WikiLeaks. It turned out CNN’s sources provided the wrong date for the email. Trump Jr. actually received the email Sept. 14, 2016, a day after the information contained in the email had been made public. CNN was also forced to correct a June 7, 2017, article (co-authored by Tapper) that claimed James Comey...