I think you are looking for Benenson Strategy Group.
I found this: https:// fellowshipofminds.files.wordpress.com/2016/10/benenson-strategy-group-salvage-program.pdf
On this site: https:// fellowshipoftheminds.com/2016/10/21/hillary-clintons-campaign-pollster-benenson-strategy-group-says-she-is-tanking/comment-page-1/
Hope I did this right…..