April 1 (UPI) -- The U.S. Supreme Court is hearing oral arguments in a case on Wednesday that could reshape what it means to be a U.S. citizen.

The case, Trump vs. Barbara, is over President Donald Trump's Jan. 20, 2025, executive order "Protecting the meaning and value of American citizenship," which seeks to change the application of the Citizenship Clause, ending birthright citizenship.

In his executive order, Trump argued that the 14th Amendment of the U.S. Constitution "has never been interpreted to extend citizenship universally to everyone born within the United States."

The law of the land, as it has been recognized since the ratification of the 14th Amendment in 1868, has been that "all persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside."

Trump's executive order remains blocked from taking effect, with lower courts affirming that his attempt to end birthright citizenship is unconstitutional. In December, the Supreme Court agreed to take up the case, beginning with oral arguments starting on Wednesday.