But as I noted at the top, the average poll in Iowa paints the picture of a race that is too close to call. There are plenty of polls taken within the last few weeks that show Biden or Trump slightly ahead or slightly behind (Monmouth University, New York Times/Siena College and Quinnipiac University).
The reason why the Selzer poll gives Democrats chills and Republicans hope is the history of the Selzer poll. Four years ago, the
final Selzer poll had Trump up by an identical 7 points in Iowa. Trump won by 9 points.
Just like then, this 2020 poll comes in the midst of polling in a lot of other states that have Trump in trouble.
Moreover, the 2016 example is not the
only time in which Selzer was unafraid to publish a seeming outlier that proved to be correct. (The 2008 Democratic Iowa caucuses were another example.)
All that being said, there are many reasons to doubt that this Iowa poll is really telling us all that much. While Selzer is a fantastic pollster, every pollster has the occasional outlier. Selzer has been
wrong before. Pollsters aren't magicians. It's the sign of a good pollster that they are willing to publish polls that don't look like other ones.