Simpson would have been the source for anti-NRA, anti-GOP, Butina articles in 2016 and 2017. Both were sent to Bruce and Nellie Ohr.
@The_War_Economy has been on this.
12/6/2016 - Simpson sends Ohr a Butina article
2/23/2017 - Simpson sends Ohr a Butina article
4/25/2018 - FBI raids Butina's apartment
7/15/2018 - Butina is arrested