Dan Rather warned Wednesday night that if you think Tuesday was a shock with the Cohen guilty plea and Manafort's conviction, then "stay tuned." The former news anchor said other things Mueller is working on will "make yesterday pale by comparison." "Always keeping in mind that Mueller knows so much more than he has shown," Rather said in an interview with CNN's Don Lemon. "If you think [Cohen guilty plea, Manafort conviction] was a shock to our democratic system, just stay tuned. Because the other things Mueller is working on, and sooner or later we'll find out what they are,...