It is effective.
In his rallies its clear that he is not a president that cares much for the people he disagrees with in that he only preaches to the choir.
A hour speech and he most of the time he's talking about himself, how great he is, how persecuted, while re-writing past statements, leaving out little details, so that he might prove his point.
I wish he would just man up stop complaining and whining all presidents are targets.
I suspect it just a matter of time when his overstating hyperbole will turn against him. Other nations leaders are already learning that you can't trust the man
When it comes to negotiating hes a one trick pony and its all in his book the art of the deal. Step one use threats play the victim, step two use threats play the victim, step three use threats...