I'm no expert on the topic, but anyone in a position of influence has a lot more options for communicating with the public than they did a few decades ago. Leak

I'm no expert on the topic, but anyone in a position of influence has a lot more options for communicating with the public than they did a few decades ago. Leaks from SCOTUS were unimaginable in the 20th century, for example. Under the usual supply-demand assumptions, that means that any particular journalist has a lot less power in the relationship.