Nate Cohn @Nate_Cohn 1m1 minute ago Washington, DC
Key note on the AP/GfK poll: it's a probability sample conducted online. Yet Trump doesn't overperform.
Nate Cohn @Nate_Cohn 1m1 minute ago Washington, DC
To be clearer: AP/GfK is a good test of "hidden Trump" vote theory. But it's now Trump's worst poll
What does probability sample mean?
But anyways, A- IBD has weird results as well. So average and move on 
I think Cohn is making that distinction because a lot of people have been (wrongly) talking down "online" polls in general.
