President-elect Donald Trump revived talk of abolishing birthright citizenship during an interview on NBC’s “Meet the Press” on Dec. 8, saying he was “absolutely” going to end the policy. Trump also raised the issue in his first presidential campaign in 2016, but he never followed through with a promised executive order to challenge the longstanding  interpretation of the 14th Amendment, which grants citizenship to “all persons born or naturalized in the United States.” Host...