A letter from the Wisconsin Elections Commission could show up in your mail one day if you’re a registered voter and haven’t cast a ballot recently. State election managers say they aren’t going to purge the voting rolls without an order from the Wisconsin Supreme Court, but they are going to reach out to missing voters more often. Commission members voted Tuesday to contact some of the 230-thousand voters who haven’t voted in years but remain registered in the state. The state would send them a letter every 18 months or so, just to see if they have moved or changed their voter registration. Missing voters are supposed to be dropped from the registration list, but that requirement is being fought in a challenge before the state Supreme Court.