The Hmong are more concentrated in St. Paul, right though?
Yes but mostly in areas that are pretty diverse all around and have double digit white, black and Hispanic populations as well. That's true of the Hispanic population as well too, there are no Hispanic majority precincts anywhere in the Twin Cities. There's a few I can see being Somali majority, but relatively small, plus many Somalis are not eligible to vote.
Generally these demographic patterns don't show up in voting patterns because everywhere votes Democratic anyway.