empowers potus in this area:
https://www.law.cornell.edu/uscode/text/8/1157
If the President determines, after appropriate consultation, that (1) an unforeseen emergency refugee situation exists, (2) the admission of certain refugees in response to the emergency refugee situation is justified by grave humanitarian concerns or is otherwise in the national interest, and (3) the admission to the United States of these refugees cannot be accomplished under subsection (a), the President may fix a number of refugees to be admitted to the United States during the succeeding period (not to exceed twelve months) in response to the emergency refugee situation and such admissions shall be allocated among refugees of special humanitarian concern to the United States in accordance with a determination made by the President after the appropriate consultation provided under this subsection.