Sometimes the Constitution’s text is plain as day and bars what politicians seek to do. That’s the case with President Trump’s proposal to end “birthright citizenship” through an executive order. Such a move would be unconstitutional and would certainly be challenged. And the challengers would undoubtedly win.

Trump has long argued that birthright citizenship for the children of parents not legally in the United States should be abolished. “It’s ridiculous. And it has to end,” he told Axios in an interview released Tuesday, in which he disclosed his plan for the unilateral action.

But at its core, birthright citizenship is what our 14th Amendment is all about, bridging the Declaration of Independence’s promise that “all men are created equal” with a constitutional commitment that all those born in the United States share in that equality.