"This is the largest single action stripping any group of non-citizens of immigration status in modern U.S. history," said Ahilan Arulanantham, co-director of a UCLA immigration law center.

The Supreme Court said the Trump administration could move forward with canceling deportation protections for more than 300,000 Venezuelan immigrants.

Trump officials asked the justices to lift a lower-court order that barred the administration from ending TPS for Venezuelans while litigation continues.