From an article by Walter Russell Mead"
The reason that Bibi has been more successful than Obama is that Bibi understands how the world works better than Obama does. Bibi believes that in the harsh world of international politics, power wisely used matters more than good intentions eloquently phrased.
This is Scott Johnson of Powerline Blog, commenting on Walter Russell Mead's article. It is Mead's comments that are key here. Johnson describes Mead - "Mead is an acute student of American foreign policy and international affairs." Mead notes that Obama fails to deal with reality. He calls him an "aspiring realist". Mead also points out that intentions alone are of little importance.
This article is about a comparison of Netanyahu and Obama but I'd like to add this bit. Why would I want to vote for Hillary, who will only continue, or perhaps worsen, Obama's failed foreign policies?