In continuation of a previous study, the rôle of some nationality groups in the last three presidential elections has been investigated. Whereas the previous study was based upon political behavior by counties within eight states, the present work is based upon political behavior by wards within four cities. The cities were chosen because they contained large proportions of certain nationality groups, and because in these cities it was possible to order census tract material from the 1940 census by wards. Only four cities (Buffalo, Chicago, Detroit, and Pittsburgh) were examined because of limitations of time and expense. New York City is not included because of appreciable changes in the boundaries of Assembly districts between elections.

In order that a group be amenable to our procedure, it was necessary that there be proportionately great enough concentrations within wards so that the actual voting behavior of the group could possibly induce a shift in the election results. In this respect, it must be remembered that the proportion of foreign-born is usually about one-third of the total stock of any given group in the localities. Of the fourteen nationality groups studied here, therefore, not every one could be tested by our method.