So the question, "Why do people think the Democrats are going to win?" is answered ONLY by "the polling."

And dismissing the polling from 2016 is ridiculous.

Let's go over it until everyone memorizes it:

1. A huge number of voters changed their minds at the last second.

2. Most Trump supporters refuse to be polled.

3. People who've never voted before can't be polled.

Those three factors are CENTRAL to why Trump was elected in 2016 and why he'll be reelected in 2020.