Voting machines are terrible in every way: the companies that make them lie like crazy about their security, insist on insecure designs, and produce machines that are so insecure that it’s easier to hack a voting machine than it is to use it to vote.
So, you do wonder what impact this is going to have. Surely it must already have been a factor in previous elections? The only saving grace is that US states all have very different systems, and I don't think they use voting machines everywhere, but that doesn't make manipulation impossible.
Loads of articles, as it turns out:
https://www.wired.com/story/i-bought-used-voting-machines-on-ebay/
https://www.bbc.com/news/technology-54378960
https://www.schneier.com/blog/archives/2018/11/buying_used_vot.html
So, you do wonder what impact this is going to have. Surely it must already have been a factor in previous elections? The only saving grace is that US states all have very different systems, and I don't think they use voting machines everywhere, but that doesn't make manipulation impossible.