I'm afraid his advisers, and Trump, will not only agree with this, but think it is adequate.
IT ISN'T ADEQUATE YOU NAIVE FOOL. A "pledge", from that fat little lying pig? Get ****ing real. That means NOTHING in the real world. Nothing.
https://www.cnbc.com/2018/06/06/trump-must-get-nuclear-pledge-from-north-korea-before-singapore-summit.html