For all the current strength of American economy, the country lacks the economic clout to bend the world to its liking. The U.S. lacks a foreign policy that truly reflects the shift in commercial gravity toward Asia, says Jeffrey Sachs, one of the world's most prominent economists. Sachs tells Bloomberg Opinion's Daniel Moss and Bloomberg News's Scott Lanman that it's time for a new brand of statecraft to match the retreat in U.S. economic muscle.