I am a Cruz supporter...but I can say without any excuse or preamble that this was a big mistake by Cruz.
People will see and feel “big brother,” all over it...they very thing Cruz is campaigning against.
In addition, it will offend, and then anger them, and they will most likely (if they vote at all), go out and vote against whomever sent such a correspondence.
Cruz has some knuckleheads working for him...or agents working against him.
Does not matter...he himself should have seen how crazy this was and either stopped it...or if he did not find out until later...he should have apologized and fired the people who were responsible.
This will hurt him, particularly in Iowa, but also wherever people hear of it...and you can bet the competition will trumpet it far and wide.
I'm sure they all do.