"They played right into Russia's hands IF IT WAS RUSSIA." I can take over the investigation if I want to". The don at his most worst?

He seems a little unhinged. Was he unhinged in person? Do his tweets make him seem frantically erratic unstable and ungeniusy? In person when he is tweetless is he an alright charming guy? Does the tweeting turn him into what he seems to be when he tweets? A wackadoodle?