Trump Signs Executive Order Ending Birthright Citizenship on Day One — Federal Judge Blocks Within Hours

President Donald Trump signs an executive order on his first day in office attempting to end birthright citizenship for children of undocumented immigrants — a direct challenge to the 14th Amendment's Citizenship Clause. The order directs federal agencies to refuse to issue passports or citizenship documents to children born in the US to undocumented or temporary visa-holding parents. Multiple lawsuits are filed within hours by 22 states and civil rights organizations, and a federal judge issues a temporary restraining order the following day, calling the order 'blatantly unconstitutional.' The 14th Amendment, ratified in 1868, guarantees citizenship to 'all persons born or naturalized in the United States,' and the Supreme Court has consistently upheld this interpretation since US v. Wong Kim Ark in 1898. The order represents the most direct frontal assault on a constitutional amendment in modern presidential history, establishing the pattern for Trump's second term of testing legal boundaries through executive action.