In the case of Duncan v. Missouri in 1893, the U.S. Supreme Court was tasked with determining whether a state could impose harsher penalties on repeat offenders without violating their constitutional rights to equal protection and due process under the law. The defendant, Duncan, had been convicted of grand larceny and sentenced to ten years in prison because he had previously been convicted of another crime - a practice known as recidivist sentencing or habitual offender laws. He argued that this violated his Fourteenth Amendment rights by punishing him more severely for past behavior rather than just his current offense. The court disagreed with Duncan's argument and upheld Missouri's right to enact such laws, stating that they did not violate any constitutional protections but were instead intended to protect society from those who demonstrated a pattern of criminal behavior. This decision affirmed states' authority over their own penal systems and set an important precedent regarding recidivist sentencing practices across the country.

In the dissenting opinion for Duncan v. Missouri, it was argued that the Double Jeopardy Clause of the Fifth Amendment should apply to state trials as well. The justice disagreed with the majority's view that this clause only applied to federal proceedings and not states, arguing that such a distinction was inconsistent with both historical precedent and constitutional interpretation. They contended that when an individual is put on trial for a crime in any American court - be it state or federal - they are being accused by their country, not just their specific jurisdiction. Therefore, they believed protections against double jeopardy should extend across all courts within America's borders. This viewpoint emphasized fairness and uniformity in legal proceedings nationwide rather than allowing potentially divergent interpretations based on geographical location.