I haven't watched CNN for YEARS, myself, but I know that they have only an audience of Leftist Loons who voted for their Messiah, who lap up the State-Run-Media talking points (handed to their media propoganda outlets and reported as "news").
Their polls are just as worthless, as it simply is a reflection of their viewership.
They could influence up to a dozen voters!
The only reason they have ratings is when you travel the airport makes you watch their TV which is always set on cnn.