An enormous amount - see, for example, this study: https://www.voteriders.org/wp-content/uploads/2023/04/CDCE_VoteRiders_ANES2020Report_Spring2023.pdf https://w

An enormous amount - see, for example, this study: https://www.voteriders.org/wp-content/uploads/2023/04/CDCE_VoteRiders_ANES2020Report_Spring2023.pdf https://www.voteriders.org/wp-content/uploads/2023/04/CDCE_V... About 10% of eligible voters don't have the ID they would need. The people most likely to lack proper ID for voting are young, Black or Hispanic, and poor. Lots more details in the report!