This is the Cambridge Analytics of voter deterrence that Ch. 4 in the UK did. It’s been hard to get ahold of in the states but I think it should be seen.
I’m sure someone’s going to bring up the project veritas issue as well, so before you do, I’ll say that I think anyone democratic or republican involved in voter disenfranchisement, I think they should be punished to the fullest extent of the law.