In Mohammed’s case, District Judge Kessler at one point ordered a high government official, Daniel Fried, to appear in her courtroom and, under oath, submit to questioning about his assurances that detainees would not be mistreated in countries to which they were sent. That part of her order, too, was summarily reversed by the Circuit Court.
Cf. Souter's concurrence here. How would Kagan rule? Who knows?