The Trump administration urged the Supreme Court on Thursday to end a Biden administration-era immigration program shielding over 500,000 migrants from deportation, calling it an unlawful overreach that strains U.S. immigration courts.

Homeland Security Secretary Kristi Noem revoked the controversial parole program in March, arguing it incentivized illegal migration and failed to create a meaningful path to lawful status. But on April 14, a federal judge blocked the Trump administration’s move, leaving the program in place and setting off a high-stakes legal fight that has now reached the nation’s highest court.