WASHINGTON, DC - MARCH 04: U.S. President Donald Trump (L) greets Chief Justice of the United States John G. Roberts, Jr as he arrives to deliver an address to a joint session of Congress at the U.S. Capitol on March... WASHINGTON, DC - MARCH 04: U.S. President Donald Trump (L) greets Chief Justice of the United States John G. Roberts, Jr as he arrives to deliver an address to a joint session of Congress at the U.S. Capitol on March 04, 2025 in Washington, DC. President Trump was expected to address Congress on his early achievements of his presidency and his upcoming legislative agenda. (Photo by Win McNamee/Getty Images) MORE LESS

With a hearing on the constitutionality of birthright citizenship now on the calendar, I want to return to a basic point we’ve discussed several times over the last year. Given our experience living mostly in “normal” times, many of us are used to the idea that the law evolves over time. When judges create new case law, the law evolves and changes. And we accept that it has “changed” — in a certain meaning of the word — even when we may not agree with the change. But with so many other things that have changed slowly since 2016 and then rapidly from early 2025, these are outdated ideas, outdated understandings of how the world and the law works.

Birthright citizenship is a key example of this.

Birthright citizenship is clearly, explicitly and incontestably written into the U.S. Constitution. It’s the country’s fundamental law and more than 150 years of American history have been lived on that basis. There’s a reason why no one has doubted this over all those years even if many have opposed it.

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