The 2016 Iowa caucuses were more polled, more frequently, than any previous contest. Starting in November, there were multiple weekly looks at the Iowa electorate, many of them earning bright red chyrons on cable news.
But there was only one Des Moines Register/Bloomberg Politics poll — and only one Ann Selzer. …
What happened? When asked, Selzer answered right away, with something that sounded like relief. CONT.
David Weigel, Washington Post