On his first day back in office, President Trump signed an executive order to end unconditional birthright citizenship. Lawsuits immediately began pouring in, and a federal judge blocked the order for now. But as the columnist Carlos Lozada and the editor Aaron Retica point out in this discussion, the true impact of the order might not be in changing the law — at least right away — but in challenging the very idea of what it means to be American.

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