Presumptive Democratic nominee for president Senator Obama stands with Speaker of the House Pelosi, Clyburn, and Larson after the Democratic Caucus meeting on Capitol Hill

Presumptive Democratic nominee for president Senator Barack Obama (2nd R) stands with Speaker of the House Nancy Pelosi (D-CA), James Clyburn, (D-SC)(2nd L) and John Larson, (D-CT)(L) after the Democratic Caucus meeting on Capitol Hill in Washington, DC, July 29, 2008. REUTERS/Joshua Roberts (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA)