The Supreme Court on Monday allowed President Donald Trump to enforce the Alien Enemies Act for now, handing the White House a significant victory that will let immigration officials rely on a sweeping wartime authority to rapidly deport alleged gang members.The unsigned decision in the case, the most closely watched emergency appeal pending at the Supreme Court, lets Trump invoke the 1798 law to speed removals while litigation over the act’s use plays out in lower courts. The court stressed that people deported going forward should receive notice they are subject to the act and an opportunity to have their...