[boomboomsubban]

>This makes no difference, legally speaking. Assange was still helping her to gain unauthorized access to a computer system.

Yes, it does. It is the duty of the press to try to protect their sources, and the rights of a free press can not be infringed upon. While the act may be considered illegal by some other law, that law is unconstitutional.

[foldr]

The first amendment cannot be used as an excuse for aiding criminals hacking into computer systems. There is zero historical precedent for this, and it makes zero legal sense.

You are thinking of reporter's privilege, but massively overextending its scope (https://www.mtsu.edu/first-amendment/article/1146/reporter-s...).

Jorunalists are entitled to "protect" their sources in the extremely limited sense that they cannot, necessarily, be compelled to reveal information about them. They're not in any way entitled to shield their sources from law enforcement.