chicago federal judge illinois tuesday block same-day registration poll place state populous counties say law enact last year disproportionately favor urban voters rural counterparts rule result federal court lawsuit bring august group align conservative think tank challenge state law allow election day voter registration poll place counties populations 100,000 application legislation favor urban citizen dilute vote rural citizen judge samuel der-yeghiayan northern district illinois write opinion tuesday six weeks nov. election chicago-based liberty justice center file lawsuit argue population threshold unconstitutionally discriminate voters less populate counties boost democrats heavily democratic cook county chicago locate court rule illinois go election day voter registration poll place available statewide fair jacob huebert senior attorney liberty justice center ljc say statement tuesday maura possley spokeswoman state attorney general office immediately available comment whether would appeal ljc found illinois policy institute keep donors secret republican governor bruce rauner take office january 2015 publicly acknowledge give group least 500,000 period years law pass late 2014 democratic-led legislature sign early 2015 former democratic governor pat quinn allow election day voter registration first time include poll place section law pertain poll place registration pertain counties populations 100,000 democratic state senator harmon say statement tuesday disappoint decision come national voter registration day call blatantly political effort quell participation illinois elections civil right group include american civil liberties union also express unhappiness rule concern impact decision change rule vote close hotly contest election edwin yohnka director communications public policy aclu illinois say statement federal judge limit election day voter registration illinois