The Roman Emperor Marcus Aurelius is remembered as a great philosopher and successful military commander, but he is also remembered for picking his feckless son Commodus as his successor, an emperor who infamously cared more about making showy performances as a gladiator than he did governing the empire. Barack Obama is still a popular president–his favorability rating is +10 and his job approval rating is +8. In recent months many pieces have been written lamenting his imminent departure, and many more will likely be written before January. But no matter how likeable Obama is or how well Obama governed while in office, the fact that he could not ensure the election of a competent successor counts against his legacy. How did Barack Obama end up giving us a Commodus? What, if anything, could Obama have done to avoid this?