President Donald Trump is seeking to end birthright citizenship, a constitutional right enshrined by the 14th Amendment. We asked two experts in constitutional and immigration law to walk us through what the amendment says,

America started doing so at the end of the Civil War. The constitution was amended then to overturn the Dred Scott decision of 1857, which held that black people were not Americans. The 14th Amendment ensured that freed slaves and their children would henceforth be citizens.

Eighteen states have sued the federal government over the executive order, showing the legal challenges the president will face.