Sixteenth Amendment (Must & Shall)

The Sixteenth Amendment to the Constitution of the United States (ratified in the late 19th century) stripped the white men who'd led the Great Rebellion of the right to vote in national elections. That disenfrancisement extended to their descendants.

When Neil Michaels asked an elevator operator in New Orleans why Southerners never sought to repeal the Sixteenth Amendment, the young man said to do so would be an acknowledgment of the legitimacy of the U.S. government.