[jsgo]

If he's discussing with his group of friends behind closed doors either at the White House, a dinner, or the like, there is no expectation that he must share it publicly (but there's the possibility of leaks).

If he does so on a public forum, then he is not allowed to blacklist people from hearing/seeing it. He has the @POTUS account. If he's concerned about his public vs private privileges, he may wish to consider moving his government related tweets to the @POTUS account. At that point, he can tweet support for Tomi Laren (sp?) to his heart's content from his personal account. When he's discussing world stage stuff, though, that should stick to the POTUS account. That's all.