I’m talking strictly from a legal standpoint if anyone wants to challenge the results based upon that theory. You cannot compare the number of registered voters pre-Nov.3 to turn out on Nov. 3, if there was same day registration in that jurisdiction. You would have to use the registration figures from Nov. 4. Otherwise it is apples to oranges and a legal challenge would be dead on arrival.
You are correct - there is always the remote possibility that somehow Milwaukee voters (only) became super-motivated and organized to go and when vote, especially if they have had before (!)
This is a two-pronged war - legal challenges in court, and the court of public opinion
The second is much more important.
Trump’s team needs to 1) create several talking points of very obvious and clear statistical anomalies in these states and blast it out every day and 2) find specific cases of fraud - people who will admit to it, people who found they were disenfranchised or were witnesses to it. get these people in front of the public as well