The14th Amendment was intended to correct the moral wrongs of slavery. But it has been misunderstood and reinterpreted in cases involving workdays, schools, train cars and birth control.

A federal judge Thursday blocked President Donald Trump’s executive order outlawing birthright citizenship —the policy automatically giving citizenship to anyone born in the U.S.—and declared it “blatantly unconstitutional,” as legal experts widely believe the president does not have the power to change the policy on his own.