The Supreme Court early Saturday halted the administration’s ability to use the Alien Enemies Act to swiftly deport migrants to El Salvador who are being detained in portions of Texas, for

The case raises questions about the Trump administration's adherence to limits set by the Supreme Court. It carries the risk of a significant clash between the two coequal branches of government and potentially a full-blown constitutional crisis.

Justices Clarence Thomas and Samuel A. Alito Jr. dissented. A group of Venezuelan migrants had been scheduled to be flown out of the country under the little-used wartime statute, according to people familiar with the matter.