Trumptard wanting to give him all the credit for what's happening in Korea these days is BS : He's role in all this was extremely limited.
The ones who should take credit for that are Kim Jong-Un, Moon Jae-In, KimYo-Jong (Kim-Jong Un's own sister who was part of the North Korean delegation to the olympics and the south-korean negociators who went ot North Korea at the timùe of the olympics).
But beware, Kim Jon Un knows exactly what he's doing : He has completed in nuclear program proving to his people that he his capable of protecting the country against foreign enemies (such as the US), now he want to improve the country's economy, to obtain the lifting of the sanctions. Kim Jon Un's even gave a name ot that policy : "byongjin" ("double-push").