> One usually can't structure around criminal law.

I don't see how that applies in this context which is pretty simple. The transaction with Don Jr. was a board advisory role in exchange for equity. Broadly, bribery is "paying to influence the actions or decisions of a public official." Don Jr. isn't an official. He signed a contract to provide board advisory services. The contract wouldn't say anything about anything else. I've been a board advisor and signed a similar contract (if not the same one, they're quite pro forma).

Absent a secret recording establishing payment for influence, there's nothing to prove bribery. Do I think making him an advisor was done in the hope it would influence his father to promote and sign favorable legislation? Absolutely. Do I think there's any chance evidence exists to prosecute that? No.