Wisconsin Legislature: 757.19(2)

757.19(2) (2) Any judge shall disqualify himself or herself from any civil or criminal action or proceeding when one of the following situations occurs:

757.19(2)(a) (a) When a judge is related to any party or counsel thereto or their spouses within the 3rd degree of kinship.

757.19(2)(b) (b) When a judge is a party or a material witness, except that a judge need not disqualify himself or herself if the judge determines that any pleading purporting to make him or her a party is false, sham or frivolous.

757.19(2)(c) (c) When a judge previously acted as counsel to any party in the same action or proceeding.

757.19(2)(d) (d) When a judge prepared as counsel any legal instrument or paper whose validity or construction is at issue.

757.19(2)(e) (e) When a judge of an appellate court previously handled the action or proceeding while judge of an inferior court.

757.19(2)(f) (f) When a judge has a significant financial or personal interest in the outcome of the matter. Such interest does not occur solely by the judge being a member of a political or taxing body that is a party.

757.19(2)(g) (g) When a judge determines that, for any reason, he or she cannot, or it appears he or she cannot, act in an impartial manner.