I know in 2012 there were many of those in largely African-American urban areas. Philadelphia for example had 59 such precincts, but also Chicago, Cleveland, Atlanta and other cities had them too. Going through New York Times map, I am having trouble finding any. Only 100% I see for either party are really tiny precincts with number of voters in single digits so probably all from same household. A lot of inner city ones where Biden getting in high 90s and Trump low single digits, but seems unlike 2012 Trump did get some votes in most of those precincts even if not many. Are there still any of such precincts or was Trump able to win a few votes in each?
There were probably precincts in Chicago where Trump got 0 votes. But I don't know for sure.
