"Resident aliens" cannot vote. ONLY US citiznes can vote. Once one has become a citizen they are no longer an immigrant as they have surpassed being an "immigrant" and fullfilled all the obligations of attaining citizenship. Am I missing something here?
Once one has become a citizen they are no longer an immigrant
Not according to the American Heritage Dictionary: "A person who leaves one country to settle permanently in another."
An immigrant is still an immigrant whether citizen or not, although many people would use "naturalized citizen," which says it all.