No person may knowingly make or publish, or cause to be made or published, a false representation pertaining to a candidate or referendum which is intended or tends to affect voting at an election.
Wis. Stat. § 12.05
A violation of this section does not constitute defamation per se. Tatur v. Solsrud, 174 Wis. 2d 735, 498 N.W.2d 232 (1993).