He's more than likely going to be totally deranged. The only question is how much he relies on rhetoric vs action. Incompetence is a given, but when the secdef position... he can kill a shitload of people. Of course in theory secdef answers to the president, but, they've gone "rogue" before to varying degrees. They hold immense authority at the end of the day and few will question their authority if they just say the president made the order. Genuinely crazy shit, but... not unexpected unfortunately