Again, I have said repeatedly that republican voters don't care about policy, they care about "who". That's the question they ask when deciding whether a policy is good or bad.
Trump got nothing from the North Koreans, a paper where they say we reaffirm to do. Saying we reaffirm is literally saying we are changing nothing.
Yet these same people savaged the Iran deal.
Again for republicans, Obama represents a multiracial, multi religious, more worldly America that they hate and fear, and trump represents white Americans and them remaining the real americans. So whatever President Obama did was inherently bad and wrong or weak or stupid because he was not one of them, and whatever trump does is great.
This is how republicans can support trump when outside of hating muslims, south American immigrants, and black people from craphole nations, they have no idea what he believes about anything.