A federal judge on Thursday temporarily blocked President Donald Trump’s executive order redefining birthright citizenship, calling it “blatantly unconstitutional” during the first hearing in a multi-state effort challenging the order.

A federal judge in Seattle has signed a temporary restraining order blocking President Donald Trump's executive order on birthright citizenship. U.S. District Judge John Coughenour on Thursday heard a request made by four Democratic-led states to issue a temporary restraining order against the executive order signed by Trump that purports to limit birthright citizenship -- long guaranteed by the 14th Amendment -- to people who have at least one parent who is a United States citizen or permanent resident.

President Trump has signed an executive order to effectively end birthright citizenship. Here's what it means, and how the 14th Amendment is related.