In the few days since he returned to the White House, President Donald Trump’s sweeping executive orders and mass pardons have shattered political and legal norms. But one order is in a category of its own.

Multiple states and cities are suing President Donald Trump over his executive order ending birthright citizenship. Their argument is that a person born in the United States is a citizen of the United States and is protected under the 14th Amendment to the Constitution.

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