No they can't for consorting, suspected of a crime is a different matter. Interviewing anyone is not seen as a criminal activity. The gray zone is around protecting sourses. But, recieving state secrets, for example, there is a lot of protection, traditionally, under the protection against prior censorship. So, for example, the pentigon papers, which were published revieling secrets about the Vietnam war, and help end out involvement by showing the illegal invation of Cambodia, among other secrets, were protected by the first amendment. The harm government secrets can do, often outweighs the good... as we are finding out in the present war.