Since he changes his "mind" all the time, sometimes in the same sentence, perhaps that makes him an "uncertain trumpet"?
For if the trumpet give an uncertain sound, who shall prepare himself to the battle? 1 COR 14:8 KJV
Hmmm, maybe Trump is a man of peace after all, that is if he is really uncertain. Now I'm uncertain about how to decide this. Maybe he's 'certain' about changing his mind. In other words, this is all part of his (and Hillary's) plan, which would make him 'certain'. Now Hillary (via Bill's plane trip with Loretta) is in hot water again, as soon as the Republicans let her off the Benghazi hook.
From doing a search, it seems that the "uncertain trumpet" is quite a popular theme.