By making those findings, the Trump administration concluded that Tren de Aragua members could be immediately detained and deported without an opportunity for judges to determine whether the Alien Enemies Act applied or whether the people involved were even members of the gang.

The Supreme Court in a 5-4 ruling on Monday handed President Donald Trump a major victory by allowing him to invoke the 1798 Alien Enemies Act to deport suspected gang members of Tren de Aragua for the time being.

U.S. Supreme Court Chief Justice John Roberts paused a federal judge’s order that required the Trump administration to return an illegal alien who was deported to El Salvador.