Nielsen Voter Ratings Bring Added Representation, Granularity to Political Campaign Data
https://www.nielsen.com/us/en/news-center/2016/nielsen-voter-ratings-bring-added-representation-granularity-to-political-campaign-data/
https://www.nielsen.com/us/en/news-center/2016/nielsen-voter-ratings-bring-added-representation-granularity-to-political-campaign-data/