Charlie Cook having totally blown 2014 and 2016, knows his credibility is dead if be blown 2018 as badly. Suddenly being a tame mouthpiece for the DNC isn’t looking to be the smart career move for Charley boy
Polls will get better nearer the election...if they cannot depress the GOP vote..
In 2016, Charlie was right on the money for the House, the actual result was +6 seats for the Democrats. The piece that he missed was the Presidential contest. Of course, everyone missed that one.
You can see the House results for 2016 and the pundit predictions here:
https://en.wikipedia.org/wiki/United_States_House_of_Representatives_elections,_2016