Are there really that many cases of the type you describe? Tens of thousands?
If so, how was the information assembled to make an organized exploit possible? Don't forget, HIPAA laws now make it a serious crime to misuse patient data. there is nothing in the world to prevent you from voting in their place and signing their name to the list. Noone in the world believes that unless a vote is challenged, anyone compares signatures to the original registration list.
OK, so no Wisconsin Republican knows how to challenge a vote? There are no Republican attorneys in Wisconsin who can figure out how to do this?
More like none who are WILLING to do this.....and not only in WI!