He thinks differently. I like that and I’d think Trump would too, but for some reason Bolton is not a no-brainer for him.
Evidently he is looking for something that Bolton lacks. My guess would be trade negotiation skils, more from a business-finance side than as traditional diplomacy.
But of all the candidates I think Bolton is the most agile and smartest, thus best equipped to learn and adapt.
Like a track record that isn't diminished by his support for some of the most disastrous foreign/military policy decisions the U.S. government has made since the Vietnam War, for example.