A federal judge blocked Donald Trump's administration on Thursday from implementing the Republican president's executive order curtailing the right to automatic birthright citizenship in the United States,

Most legal experts say the Constitution grants citizenship to children born in the U.S. to undocumented immigrants.

A federal judge is set to hear the first arguments in a multi-state lawsuit seeking to block President Donald Trump’s executive order ending the constitutional guarantee of birthright citizenship regardless of the parents' immigration status.