The Supreme Court is hearing arguments Thursday in its first case stemming from the blitz of actions that have marked the start of President Donald Trump's second term.
Before the court are the Trump administration's emergency appeals of lower court orders putting nationwide holds on the Republican president's push to deny citizenship to children born to people who are in the United States illegally.
Birthright citizenship is among several issues, many related to immigration, that the administration has asked the court to address on an emergency basis, after lower courts acted to slow the president's agenda.
The justices are also considering the administration's pleas to end humanitarian parole for more than 500,000 people from Cuba, Haiti, Nicaragua and Venezuela and to strip other temporary legal protections from another 350,000 Venezuelans. The administration remains locked in legal battles over its efforts to swiftly deport people accused of being gang members to a prison in El Salvador under an 18th century wartime law called the Alien Enemies Act.
In Thursday's arguments, the justices will be weighing whether judges have the authority to issue what are called nationwide, or universal, injunctions. The Trump administration, like the Biden administration before it, has complained that judges are overreaching by issuing orders that apply to everyone instead of just the parties before the court.