Reducing the number of polling places in districts that tend to not vote Republican causing very long lines for voting. When it takes hours standing in line, often outdoors in bad weather, it discourages voting. Add to that laws in many states that criminalize providing food or water to people in such lines and it is even more discouraging.
Prosecuting people for innocent mistakes while voting. E.g., Crystal Mason [1]. Or Hervis Rogers [2].
In the Rogers case he was convicted of burglary in 1995 and was in prison until being paroled in 2004. His parole ended in June 2020. He didn't know that he was ineligible to vote, and voted in the Democratic primary in March 2020. The Texas legislature did pass a bill in 2007 that required the Department of Criminal Justice to notify people who had been in custody of their voting rights situation, but Governor Perry vetoed it.
Texas attorney general Paxton had him arrested and prosecuted. Bail was set at $100000. Eventually the case was thrown out because the attorney general does not have the authority to unilaterally prosecute voter cases. He has to get approval from local country prosecutors.
In nearly all these cases the prosecutors are very disproportionately prosecuting minorities and women.
Same with processes to restore voting rights for felons. See Rick Scott's handling of petitions to restore voting rights in Florida [3].
> And please don't say voter ID, nobody is disenfranchised by voter ID.
There are in fact a lot of US adults without an ID that works for their state's voter ID laws and would have a hard time getting such an ID because of cost (monetary and/or time). Here's a relatively recent report on the number who lack ID [4].
Yes, I know that most state voter ID laws require there to be no cost or fee to obtain the ID from the state but there are often significant costs to obtain the documents required to apply for the ID. Furthermore the offices that can process the application are often far away from where the people without ID live, and only accept applications during limited weekday hours. That can mean having to take unpaid time off from work and finding a way to get to that office. In reality that all can add up to over a $100.
If it was actually about election security and not intended to disenfranchise legal voters the voter ID laws would include provisions to make it easy to obtain ID without those burdens described above.
Here's a link to a comment that contains a dozen links with a lot more detail [5].
EDIT: I missed a disenfranchisement tactic. Election officials should go through the voter rolls occasionally and purge people who they have good reason to doubt are still eligible. But that can be turned into a disenfranchisement tactic by doing that just before an election possibly without trying to notify the purged voters that they have been purged so that the purged voters who are still eligible don't find out until it is too late to get back on the rolls in time to vote.
Both parties engage in gerrymandering.