WASHINGTON, DC - APRIL 01: Police stand outside the U.S. Supreme Court ahead of U.S. President Donald Trump's expected arrival on April 01, 2026 in Washington, DC. The Supreme Court is hearing oral arguments in Trump v. Barbara to determine if President Trump's executive order ending birthright citizenship is constitutional. According to historians and the Court, this is the first time a sitting president has attended oral arguments at the nation's highest court. (Photo by Heather Diehl/Getty Images)