Wasn’t being “white” legally required to vote in federal elections for most of US history? Were any of these groups ever prohibited from voting on the basis of not being “white”? I have never heard of that happening, have you? I think that would answer the question, since the government was actually in the business of determining “white”-ness at that time, and unless I’m mistaken, all of those groups were determined by the federal government to be “white”.
> Slavic peoples were considered to be people of an "inferior race" who were unable to assimilate into American society.[4] They were originally not considered to be "fully white" (and thus fully American), and Slavic peoples' "whiteness" continues to be a debate to this day, but most people consider them to be of Caucasian culture