As Mitt Romney and President Obama begin the battle in earnest for the White House, they're touting their ability to do everything from fix the economy to restore America's standing in the world. But how much power does the president actually have? Not nearly as much as most people think. Take health care reform for example: Despite Obama's encouragement, the ultimate package that Congress passed came short of what the president wanted and there's still a possibility that the Supreme Court will shoot it down.
Freakonomics: Does The President Really Matter? (VIDEO)