Wisconsin is holding a special election on January 16, 2018, to fill the vacant Assembly seat, 58th district, in Janesville. The Socialist Party has petitioned to run Christopher Lewis Cook for the seat. Assuming his petition is valid, he will be the first Socialist Party legislative candidate on the ballot anywhere in the U.S. since 2012, when the party had two candidates on for the Indiana legislature. Here is a link to the Wisconsin elections commission site, showing the candidates. Thanks to Michael for the link.