Wisconsin Statutes State Employment Relations (Ch. 230) § 230.18. Discrimination prohibited

No question in any form of application or in any evaluation used in the hiring process may be so framed as to elicit information concerning the partisan political or religious opinions or affiliations of any applicant nor may any inquiry be made concerning such opinions or affiliations and all disclosures thereof shall be discountenanced except that the director may evaluate the competence and impartiality of applicants for positions such as clinical chaplain in a state institutional program. No discriminations may be exercised in the recruitment, application, or hiring process against or in favor of any person because of the person's political or religious opinions or affiliations or because of age, sex, disability, race, color, sexual orientation, national origin, or ancestry except as otherwise provided.