I guess you missed the Vote for Ted Cruz on the bottom of the ad.
Exactly. All this "Cruz had nothing to do with the attack ad stuff" is incredibly naive. If you believe that, then I've got some dehydrated water to sell ya. ;)
Even though it may technically be against the law, apparently candidates speak with their SuperPACs all the time. And breaking the speed limit is against the law too, but how often does that stop people? :)
Besides, if Cruz read had a problem with the ad, he would've condemned it immediately. Since he did not, it's not that hard to read between the lines.