An intimidating campaign letter can land one in jail? Well, how about all those Dimocrap letters telling older citizens they'll be eating dog food, or government employees they'll lose their jobs, etc. if they don't reelect crooked Dimocraps? How many of them are in jail?
The jails are already filled to the brim with Democrats. Tossing their lawyers in there would only add to the confusion and violence.
Nguyen ought to have a First Amendment defense against any effort to lock him up for the offense of telling noncitizens they can't vote.