Put simply, under Trump’s order, the children of most undocumented immigrants wouldn’t be US citizens, nor would the children of people in the country on student, work, or tourist visas. This is more than a reinterpretation of the 14th Amendment — it’s an attempt to do away with the jus soli principle that undergirds US citizenship.

The American Civil Liberties Union (ACLU), along with several other pro-immigrant groups, is suing the Trump administration after President Donald Trump signed an executive order that seeks to end the constitutionally recognized right of birthright citizenship. The 14th Amendment of the U.S. Constitution states in its first sentence that: