His sellout of the Kurds is crazy, and even McConnell and Graham are criticizing it. Once again Trump proves he has no idea what he is doing, and as Krugman points out it is very likely conflicts of interest are behind his move.
I side with people who think Trump never thought he would win, and didn't actually want to win, the presidency. And I think that he has come to realize that it is going to be bad for him in the end, meaning bad for his balance sheet, due to the scrutiny he is facing in office.