Hundreds of demonstrators gathered outside the courthouse on a gray and chilly morning to show their support for the Dreamers, immigrants who were brought to the United States illegally or overstayed a visa as children.
DACA, launched in 2012 by Democratic former President Barack Obama, provides roughly 661,000 such immigrants with deportation protection and work permits.
She was born in Mexico City, and her mother brought her to the United States at age 5.
No DACA opponents were evident outside the Supreme Court, but Dan Stein, president of the Federation for American Immigration Reform, which favors lower levels of immigration, argued that Trumps termination was lawful.
Arisaid Gonzalez Porras and her brother Sergio, both DACA recipients and undergraduate students at Georgetown University, said the court should affirm the programs legality, but that a permanent fix is needed.