Anyways, that’s enough from this conservative. You guys keep doing you, but maybe move the discussion back on topic I say, as I dive down this rabbit hole.
This topic is very accurately described as a rabbit hole, I decided to do some quick research into this myself and the amount of examples and information was far too much for me to summarize in a reasonable amount of time. I'll go through the various ways that I found that would constitute voter suppression and I'll link to a compilation of sources listed by state, but understand that this post is just scratching the surface of this topic.
1. Gerrymandering
This is the one that you've already used, but I think that you severely underrate just how egregious gerrymandering is. First, while you are correct that both sides do this, republicans have intentionally and methodically taken this practice to extremes that democrats have not met in the slightest. For a more statistical reading on this, you can read this:
http://election.princeton.edu/2012/12/30/gerrymanders-part-1-busting-the-both-sides-do-it-myth/ I do understand it is a bit long though, so here is an example of one of the important graphs:
where the author isolated the votes with demonstrable statistical defeciencies in voting numbers vs representatives and found that the actual impact of gerrymandering done by republicans was more than eleven times that done by democrats. This is certainly not by accident; the republicans after their loss in 2008 made a concerted effort to pour money into state house races (that are normally sidelined for national ones in terms of funding) in order to get control of redistricting in a strategy later dubbed the REDMAP project. You can read about it more here:
https://www.wbur.org/hereandnow/2016/07/19/gerrymandering-republicans-redmap
Republicans have also been much more hesitant to actually do anything about this massive problem. There is a serious initiative among the Democratic Party to try to end gerrymandering with multiple democratic candidates trying to solve the problem, but no such initiative seriously existed within the last republican race. A court case that could have ended gerrymandering as we know it came up last year, but gerrymandering was ruled out of the court's jurisdiction by, you guessed it, a 5-4 republican majority.
2.
Voter purges
This front of suppression has actually been in the news fairly recently, as there have been concerted efforts by republicans in Georgia and Wisconsin to purge people from the registration record in order to make it more difficult for those people to vote. This is probably the most basic method of suppression so I won't delve into too much detail, and while it is absolutely a historical issue that happens fairly often I'll link the most recent examples to keep this as current as possible.
https://www.theguardian.com/us-news/2019/dec/31/voter-purges-republicans-2020-elections-trump
https://www.nwaonline.com/news/2019/mar/02/federal-judge-halts-texas-voter-roll-pu/
https://www.nbcnews.com/politics/po...s-order-ohio-allow-purged-voters-back-n929526
(luckily our court systems seems to be able to stop them sometimes)
3.
Voting site manipulation
This technique is exactly what it sounds like: it consists of manipulating where voting sites are located in a way that would make voting sites in areas that don't vote republican more inconvenient to use in some way, usually either by making them farther away from voters or by making the lines much longer. This is usually done on the statewide level so I'll just link some documented examples of this happening, though this is much more difficult to pin down than most of these methods.
https://www.ajc.com/news/state--reg...tion-oversight-lifted/bBkHxptlim0Gp9pKu7dfrN/
https://fox4kc.com/2018/11/02/kansa...sed-the-change-but-a-judge-says-its-too-late/
4.
Voter registration
While the former strategy attempts to control the vote by making it more convenient to get to the polling site once registered, this strategy relies on making registering itself harder. This is a pretty broad category done in a couple ways: by closing registration excessively early, by closing DMVs or opening them at restrictive times (which lessens the effects of moter voter laws), by rejecting groups that work to register minorities, and so on. Here are a couple examples.
https://newrepublic.com/article/121...e-hammers-minority-voter-registration-efforts
https://www.justice.gov/usao-sdal/p...ensure-equitable-driver-license-office-access
5.
Felon voting
This is probably the type of voter suppression that I'm most familiar with, as my home state of Florida has been doing this for decades, and is perhaps the most egregious example on this list. These disenfranchisement laws that can permanently take away the right to vote of someone who has committed a felony even after they have served their debt to society often stem directly from Jim Crow era laws (as the one in Florida did), and are present in their most intense forms almost exclusively in republican states:
Before an advocacy grouped forced these suppression laws to a referendum in 2018, these voting rights had to be restored by a council
directly led by the governor. Our wonderful Rick Scott, who has been governor for most of my life, was famous for only restoring rights of under 100 people per year, although far more than that would appeal. This might sound like a lot on the surface, until you consider that under this law 1.5 million people were barred from voting, which translates to about a third of our African American male population at the laws peak. This method of reinstitution was directly architected by Rick Scott, as you can read about here
https://www.tampabay.com/florida-po...das-system-for-restoring-felon-voting-rights/
The people of Florida voted to end this nonsensical system in 2018 and to restore the voting rights of all felons, but republican politicians have opposed this referendum every step of the way:
https://theintercept.com/2019/01/08/florida-felon-voting-rights-amendment-4-2/ Here they claim that the system won't be ready for the next election, despite the clear directives from the Florida DoS. They also claimed multiple delays to the system, if you want to find a news story for each one you are free to but it would take too long for the purposes of this post.
https://www.nbcnews.com/politics/po...ghts-despite-constitutional-amendment-n985156 Here they require that people who want their voting rights restored must pay court fees, a move accurately described by democrats as an effective poll tax
Virginia has a similar system as you can see in that wikipedia article, their democratic governor managed to restore the voting rights of some but the Jim Crow era law at its core still remains. I'm going to stop with these two states, though I am sure that you can find egregious conduct in some of the other states mentioned in that article.
There are more methods of voter suppression that I might edit in later, but I'm done for now.
Here's the list of news examples by state:
Edit: Republican politicians at the very least seem to admit that lower turnout is a good thing for them, even if they won't admit to suppressing the vote in public. Mitch Mcconnell has even gone so far as to call making Election Day a national holiday a "power grab" by the democrats. I don't know how you can get more clear than that.