Rubio says US does not know whereabouts of 137 Venezuelans deported under the Alien Enemies Act

[ancianita]

5. Boasberg should hold him & the rest in contempt, fine each of them $100,000 every single day until they turn up the 137

on U.S. soil. He can make them pay or jail them for contempt. Their choice.
Court orders are typically enforced by the U.S. Marshals Service, which is part of the executive branch, but should no longer be under executive jurisdiction when an executive branch cabinet member is in contempt.

Rubio, et.al, do not have absolute immunity: The Supreme Court has long held that government officials may not willfully disobey court orders. High federal officials, including cabinet secretaries, do not have absolute immunity from court sanctions for official acts.
Civil Contempt Sanctions can involve coercive fines or, in rare cases, imprisonment until the official complies with the order.
This is not pardonable by the President.