Are you trying to compare Obama to Duran? The only thing they have in common is, in that clip, Duran was a lightweight
Duran was a natural junior welter if there's such a thing as an ideal weight division for a fighter. He and Roy Jones had the same basic problem i.e. at some point they had scared everybody close to their sizes into the woodwork and had to start beating up progressively bigger people to make money at it. At that point, you need to switch to some other sport.
More like Duran vs Loenard with Duran saying, “No Mas.”