Re: 'not the most powerful man in the world'
Being fair to Obama, the US system stopped him from delivering, as it is designed to do. The Prez can do little without a majority in both houses of Congress, and the generally corrupt pork-barrel system means that wasn't going to happen. Unusually there is now a Prez whose nominal party does have Congress majorities, so he can, in theory, change things. Pity it's happened at a time when the Prez is quite a few olives short of a pizza.