The black majority precincts on the northeast side of Waterloo, Black Hawk County also went heavily for Clinton. Clinton won 100% of the delegates in one likely African American-majority precinct, and 70-80% of the delegates in two others. So yes, there is evidence that African Americans broke heavily for Clinton in Iowa.
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.
