Sean Hannity news is a real problem for Michael Cohen
edition.cnn.com/2018/04/16/opinions/sean-hannity-news-is-a-real-problem-for-michael-cohen-coates/index.html
In fact, while responding on his radio show to news that he had been identified as one of Cohen's three clients, Hannity explicitly stated that he was never represented by nor had he ever retained Cohen. He bent over backwards to deny the relationship
[...]
Hannity's denial fatally undermined any credible claim by Cohen that their communications were protected from disclosure by the attorney client privilege. The privilege extends to only those private conversations that take place within an established attorney-client relationship, and even then, those conversations must specifically pertain to legal advice. The privilege does not extend to conversations simply because one of its participants happens to be an attorney.
Interestingly enough, this is precisely what the government argued in favor of the disclosure of Cohen's communications with other purported clients. To get the search warrant in the first place, the government had to have convinced the court that Cohen and his so-called clients were not actually in an attorney-client relationship, and therefore their conversations were not privileged.
Hannity just confirmed that to be true, at least with respect to himself. That certainly undermined the credibility of Cohen and perhaps explains why Cohen wanted to keep their relationship confidential.
But even if an attorney-client relationship between Cohen and Hannity did actually exist, it is the client, not the attorney, who controls the disclosure of communication. Even if Cohen wanted to disclose the discussions, he would only be allowed to do so if Hannity agreed to it.
But in this case, Hannity isn't asserting the privilege, so Cohen lacks any basis not to disclose the information or to prevent the government from looking at any communications between himself and Hannity.