As president of American, Obama has the most powerful to effect international affairs, but his power was restricted by the congress in his own country
For dictator, they power is almost infinite in their own country, as Kim Jong-un, but out of north Korea, he almost has no power.
Yes, Obama as the POTUS is likely the most powerful man in the international affairs, but it still remains to be seen whether he is the most cunning and crafty among other powerful politicians out there? My point is that how effectively he uses his power and escapes the possibility of this power being used against him and the U.S.