For context, there are heavy legal restrictions on why, how, and when moving between states in the US can remove people from the voter roll in their old state.

For context, there are heavy legal restrictions on why, how, and when moving between states in the US can remove people from the voter roll in their old state. Unless the voter tells their old state to remove them, the state has to send them a notice and wait until after the second Federal election - if they vote in any election before then, the state can't remove them. (This is probably why Gregg Phillips, the guy who Trump was promoting as a voter fraud expert for some reason, was registered in multiple states.) Also, the only legally safe trigger for starting the removal process is the US Postal Office's change-of-address process, and it wouldn't surprise me if the ACLU challenged even that. Not only that, removing people from the voter roll for this reason almost always results in headlines implying or outright stating that this is voter suppression. There's even a popular conspiracy theory about the 2016 US presidential election (started by journalist Greg Palast) that relies on the assumption that almost every voter marked for removal from the rolls in the key swing states of Pennsylvania, Michigan, and Wisconsin in this process was a Democrat voter whose vote was suppressed.