Decision on the International Organization for Migration's director general comes at a time when U.S. immigration practices face national and international scrutiny.
With no water or food, migrants are forced across the border at gunpoint in the searing heat.
Trump said his relationship with North Korea "is very good" and that he expects "a total denuclearization, which is already starting to take place."
Even some U.S. allies think it was a bad idea. But China stands to gain.
Moscow said the body is meant to serve all U.N. members, not just the U.S.
With no official peace treaty and a heavily fortified border between them, the Koreas are still very much living the Cold War.
Hodeidah is a vital access point for humanitarian and military aid for the Houthi rebels.
The U.S. president said he looked forward to lifting sanctions on North Korea.
Trump's request is a shift in tone from his own tweets about the North Korean Leader.
The two leaders will have a private chat for two hours.
President Donald Trump has rejected G7 allies while speaking warmly of North Korean dictator Kim Jong Un.
The historic summit has already been endangered once by incendiary remarks from Trump's White House.
Philip Alston, a human rights expert, wrote in his new report that economic inequality "could be readily eliminated" with political will.