County and municipal clerks and poll workers across Wisconsin may have unlawfully altered witness statements on thousands of mail-in ballots across the state, "The Dan O'Donnell Show" has learned. Wisconsin Statute 6.86 provides that an absentee ballot must be signed by a witness, who is also required to list his or her address. If a witness address is not listed, then the ballot is considered invalid and must be returned to the voter to have the witness correct. Instead, multiple sources tell "The Dan O'Donnell Show," municipal clerks and vote counters across the state simply filled out witness signatures themselves....