> basically match the Iowa results so far

Actually, they don't quite match at all.

Sanders campaign released partial results on 4th/Feb that shows Sanders:29% and Buttigieg:24% [1][2]

[1] https://twitter.com/HCTrudo/status/1224578194948468739 [2] https://www.salon.com/2020/02/04/sanders-campaign-releases-i...?