Wisconsin Statutes Elections (Ch. 5 to 12) § 6.03. Disqualification of electors

(1) The following persons shall not be allowed to vote in any election and any attempt to vote shall be rejected:

(2) No person shall be allowed to vote in any election in which the person has made or become interested, directly or indirectly, in any bet or wager depending upon the result of the election.

(3) No person may be denied the right to register to vote or the right to vote by reason that the person is alleged to be incapable of understanding the objective of the elective process unless the person has been adjudicated incompetent in this state. If a determination of incompetency of the person has already been made, or if a determination of limited incompetency has been made that does not include a specific finding that the subject is competent to exercise the right to vote, and a guardian has been appointed as a result of any such determination, then no determination of incapacity of understanding the objective of the elective process is required unless the guardianship is terminated or modified under s. 54.64.