> Well, this was after a Democrat won a Senate election in that state thanks in large part to the Native American population. Most Native Americans live on reservations in that state and part of living on the reservations is a lack of physical mailing addresses.

There is nothing about a reservation that prevents it from having a mailing address. People on reservations receive mail all the time. Even someone who doesn't currently know what it is can find out. And it seems like a pretty crappy voter suppression method if it at best only works until people figure out what their mailing address is.

> Nothing about having a physical address is going to make voter fraud less likely.

Having a physical address proves you live in the district. It prevents people from making a mistake and voting in the wrong elections, or voting in the wrong elections on purpose. It gives the government something to investigate if they suspect fraud. The perpetrator will either have to give their real address (leading investigators right to them) or a fake address (allowing investigators to prove that person doesn't live there).

> It's plain as day that Republicans are just interested in suppressing the votes of people who vote against them.

The Democrats do the same thing. They regularly e.g. schedule school board elections off-cycle (a separate election day than the major elections for statewide offices) so that most people don't show up, which allows the election to be dominated by teachers unions. And there isn't even a pretext for doing that -- it has no other purpose, and wastes a ton of money to hold a separate election.