CA-29 is a little surprising. Although the Asian areas it picks up are full of first generation immigrants, it doesn't have as many Latinos as other districts that didn't make the cut.
Maybe 1st generation Asians are less likely to hide from census takers?
Well, I'm basing this on the numbers from the census itself, not on any estimates or any other source. There are other districts with a high hispanic population as counted by the census itself which didn't make this list. I think one possible explanation could be that there are a lot of Armenians in this district, in the Glendale area specifically, and will be counted as white and many are immigrants.