As President, I refuse to set goals that go beyond our responsibility, our means, or our interests. And I must weigh all of the challenges that our nation faces. I don't have the luxury of committing to just one. Indeed, I'm mindful of the words of President Eisenhower, who -- in discussing our national security -- said, "Each proposal must be weighed in the light of a broader consideration: the need to maintain balance in and among national programs."Decisions are never made in a vacuum, especially decisions made by our President. He must weigh the costs and benefits of any decision, understanding the consequences of action and inaction, within the framework of America's interests. If we want, we can "win the war" in Afghanistan, but that would require hundreds of thousands of troops and billions and billions of dollars. That, obviously, is not in our interest. Or, we could pull back from Afghanistan, Iraq, and the rest of the world (i.e., go European) and just hope for the best. But that also is not in our interest. Somedays, its tough being President of the USA.