Polling methods remain the same, even after the 2016 debachel. Funny how that happens.

CNN Poll: Trump approval down 6 points in a month, hits low among independents

Here is one of the problems with a CNN poll.  Besides believing that it is A-OK  to lie if the circumstances merit,   CNN polls are weighted 28% in favor of the Dems. In other words,  because there are more Dems than Republicans,  if they ask 70 Rupublicans about the president,  they will ask 98 Democrats.  They do not go 50/50 and then build "turnout models."  Rather they build projected turnout into the numberical demographic of the poll itself.  In this case, projecting a 28% larger turnout with Dems than the GOP.  And then they tell you their polling is "scientifc."  A total load;  no more scientific than the fantasy that a man can become a "real" woman.