New South Dakota law allows voters to challenge other voters' citizenship
(southdakotasearchlight.com)
Not being from the US, I was flabbergasted when I learned how voting laws are working there. Where I live we're all automatically registered by the government. They send a card with your name and your address. If there is an error, or if people don't get a card, they can manually register or correct the error. And we all stay registered unless we move or there is an error. That's it.
I'm in my mid life and had to register once in my 20ies because I moved a lot. Otherwise the government just automatically registers me. Nobody can challenge that except the election's office. They decide who meets the requirements to vote or not. Not some random conservative asshole that thinks people are not white enough. Democracy in the US seems like a joke.