If it was a Super PAC, and his state Spokesman claimed the mailer...that's prima facie evidence to open a Federal collusion investigation.
Granted, this is not in evidence, but the question should be asked.
The NY Times picked this up. Wow.
This is what the SoS intended.
Probably wanted a couple things. Stop the phone ringing, today, and maybe shame the campaigns into not pulling this sort of action in the future. This isn't the last election the SoS has to deal with.