What is the Alien Enemies Act? It's an 18th-century law that allows the president to detain or deport immigrants from countries the U.S. is at war with. In more than 225 years, the law had been invoked just three times,

By dusting off this disgraced law and using it to deny people their rights, President Donald Trump seeks to erase the moral and legal progress of eight decades. And unlike Roosevelt, who invoked the law after what was then the deadliest attack on the United States in history,

A federal judge has ruled that President Trump's invocation of the Alien Enemies Act to deport alleged migrant gang members is lawful, in contrast to two other judges.