You should read “The Art of the Deal.” In an average day, Trump is juggling around 12 to 14 different projects. If he laser focused on one single task it would actually make him far less effective. Trump will not fit your narrow mold of expectations.
Nonsense; he made a mistake; he needs twitter discipline. Flake is not a factor in this election; Trump has lost traction every time he has gone off message to feud with lesser players; Democrat consultants are salivating at the chance to bait him into errors during the debates, like attacking the moderators, etc.