Kim's slain half brother was a CIA informant on his way to meet his contact when he was ambushed at the airport and poisoned. How is Trump feeling about this news?
Let me guess... he'll probably say something like, "We don't know exactly what happened, there are conflicting reports, we don't know for sure... but I met Mr. Kim, he is a very strong individual, very impressive individual, very trustworthy, he is doing everything we agreed to, I'm not going to upset our very good and strong relationship over a lot of unconfirmed questions...."
Basically the same thing he did when Kashoggi was murdered by Saudi intelligence, in other words. Deny that awful dictators are doing awful things.
If he notices at all, he will turn it into a win for himself or at least fake news...probably both.