White House Chief of Staff Jack Lew and Director of the National Economic Council, Gene Sperling (L) watch as U.S. President Barack Obama (not pictured) introduces Dartmouth College President Jim Yong Kim as his nominee to be the next president of the World Bank, in the Rose Garden of the White House in Washington, March 23, 2012. REUTERS/Jason Reed (UNITED STATES - Tags: POLITICS BUSINESS)