Nixon v. Herndon
536 ( 1927 ) , was a United States Supreme Court decision which struck down a 1923 Texas law forbidding blacks from voting in the Texas Democratic Party primary . 
<triplet> United States <subj> Texas <obj> contains administrative territorial entity <triplet> Supreme Court <subj> United States <obj> country <triplet> Texas <subj> United States <obj> located in the administrative territorial entity <triplet> Democratic Party <subj> United States <obj> country