All countries diplomatic personnel and intelligence analysts devote immense time and resources to understanding the views, motivations, weaknesses and agendas of key foreign leaders. Trump’s often erratic and impulsive tweeting patterns reveals sleeping patterns, moods, what makes Trump angry, what he’s focused on, who he’s hating or cuddling up to at a given moment. In some cases, his tweets actually having geolocations turned on. So they know precisely where he was. But there’s yet another dimension to Trump’s tweeting and generally impulsive nature and it bears on the Russia investigation.