To be honest, Trump's tweet sounds as if he were drunk when writing it.
No he was entirely sober (he's a lifelong teetotaler) and it was a smart series of tweets. The conversation was all about #biggerthanwatergate and whether he'd had any improper links to russia and if they interfered in the election improperly. Now, just like he did with #fakenews, he turned around an attack on him into an attack on his opponents. Now the #biggerthanwatergate conversation is whether Obama did anything illegal or interfered in the election improperly.
From Trump'd point of view thats a much better place for the conversation to be.
This was not a smart series of tweets lol.
This is another textbook case of Trump sending out a crazy tweet early in the morning, and Trump supporters trying to spin it as a "brilliant 5-D chess move in Trump's master plan."