An article published by liberal news organization Vox covers a 2017 Stanford Study about Voter ID and minority voter suppression.
"The new study suggests voter ID laws have little to no impact on minority voter turnout"
The study goes on to say that Voter ID has been shown to increase voter turnout for all races.
Vox Article
https://www.vox.com/identities/2017/3/15/14909764/study-voter-id-racism
Stanford Study
http://stanford.edu/~jgrimmer/comment_final.pdf