Even if Nick didn't bribe someone, he still likely broke the law. The relevant portion of the
California Uniform Trade Secrets Act says:
Now, I am not a lawyer, but as that reads to me, Nick is in trouble simply if he published material he had reason to believe came from someone violating an NDA, or terms of employment, or from someone who illegally obtained the information through other means, or even from someone who mistakenly or inadvertently passed along material that was under an NDA.
In other words, Nick didn't have to use any sort of coercion. He could have found this information in an employee's journal in a dumpster ("derived from...a person who owed a duty...to maintain its secrecy"), and it would still have been illegal to publish it.
I suppose one can argue First Amendment freedoms against the law in general, but since almost every state has a UTSA, I would guess that the constitutionality of these provisions have already been tested.
I would appear to me that Nick's only real defense is that he didn't know the material was under NDA, but given that this is Apple, and that Nick runs a rumours site, I think it would be hard for him to maintain this position.