You DO realize it is how Trump has run all of his campaigns, correct? So it MUST be effective if your guy uses it literally all the time.
Trump IS an odd duck. I doubt very highly that anyone actually DOUBTS that claim. I would assume even HE realizes it. People who have the dark triad of personality traits are definitely weird. But then you add it onto someone who has clearly never been particularly smart and you get a VERY odd combination of psychopathy and overt toddler like inclinations.
Then you factor in the various weirdnesses (like not being able to walk on ramps without help or drinking using two hands to hold his cup....things which Donny himself would lambasted in anyone else) and you have a pretty weird guy.