Are there any Hispanic-majority or Asian-majority precincts? Because the entrance polls said she won non-whites by only about 25%, but the results from black precincts obviously cast some doubt on those numbers.
There are some Hispanic plurality and perhaps majority precincts in Des Moines and meat packing towns like Marshalltown, but I doubt they are majority Hispanic CVAP, let alone majority Hispanic by registered Democrats. That's especially true in the meat packing towns, where many of the Hispanics are illegal aliens.
The precincts in east Marshalltown with a relatively high Hispanic population (for Iowa, anyway) went to Sanders, but I suspect Hispanic turnout was poor. The precinct lines have changed since DRA's map, so I can't figure out exactly where the few Hispanic plurality precincts are in Des Moines, but they appear to be either a tie or maybe slight Clinton wins, depending on which precinct is the Hispanic one.
The majority-Asian precinct, Buchanan Township, Jefferson County, was a tie. The Asians who live there are largely male Indians in their 20s, largely living in group quarters (i.e. dorms). They likely attend the
Maharishi University of Management, and are overwhelmingly foreigners who can't vote in U.S. elections. So the precinct might not even be majority Asian CVAP. There also is a precinct near the University of Iowa in Iowa City that is about 30% Asian. If I found the right precinct on both maps, it too was a tie. Asians are far too dispersed throughout other precincts to make any meaningful analysis.
