When you hire someone to do a job, you normally consider what the job is and whether the person has the qualifications to do the job. In most companies of any size there will be a job description for each of its employees. It outlines what it is the person is suppose to do in exchange for a fair wage.
In the case of the president, I suppose his job description is the oath he takes.
“I do solemnly swear (or affirm) that I will faithfully execute the Office of President of the United States, and will to the best of my Ability, preserve, protect and defend the Constitution of the United States.”
I think it important to note his oath is specific to the Constitution of the United States. We may wish he was responsible for the well being of the world. But it seems pretty plain where his responsibilities lie. Obviously, there is whole issue of morality and we hope his job performance is influenced by his love for God.
But bottom line… his job is to preserve, protect and defend the Constitution of the United States. If we hired him to solve the world’s economic crisis or feed the poor in Africa, we need to rewrite his job description. Because today, we may have unreasonable expectations based on the job he was hired for.