The complaint says efforts to dismantle an atmospheric research center are part of a broader political campaign that endangers climate and weather studies.
The justices will hear arguments over the president's efforts to terminate the program, known as Temporary Protected Status, for migrants from Haiti and Syria as part of his mass deportation efforts.
"There's going to be a breaking point sooner or later," one union official warned, with travelers at some airports being told to arrive three hours ahead of time.
Ruling on a lawsuit brought by several prominent medical organizations, a district court said the federal government did not base its decisions on science in limiting Covid shots and changing the childhood immunization schedule.