The move affects submissions by people from Afghanistan, Iran, Libya, Somalia, Sudan, Yemen and other countries under travel bans or restrictions Trump imposed this year.
South Sudanese police say a gunman hijacked a small turboprop plane belonging to an evangelical Christian aid group, demanding the pilot fly the aircraft to Chad.
The RSF said in a statement the seizure of the city in West Kordofan state came as it repelled "a surprise attack" by the Sudanese army in what it called "a clear violation of the humanitarian truce".
In a world so rich, a famine in Sudan is an indictment, not an inevitability. But is the world ready to see forced hunger as intolerable? That is the question today.