No reason to sugarcoat this in any way, it is totally unacceptable. I think it's time for his dad to retire.
UPDATE: Here is Patrick Moran's statement. I don't think he broke any laws, but his conduct was still totally unacceptable.
"In reference to the "O'Keefe" video, at no point have I, or will I ever endorse any sort of illegal or unethical behavior. At no point did I take this person seriously. He struck me as being unstable and joking, and for only that reason did I humor him.
In hindsight, I should have immediately walked away, making it clear that there is no place in the electoral process for even the suggestion of illegal behavior: joking or not.
In regards to my position on the campaign, I have stepped down because I do not want to be a distraction during this year's critical election."