Is Obama becoming a lame duck?

A week that has seen US president Barack Obama zigzag between diplomacy and military action on Syria and back away from nominating Lawrence Summers as chairman of the Federal Reserve has raised questions about the president’s leadership. Gideon Rachman and Richard McGregor in Washington join Ben Hall to discuss whether the Obama administration has stalled and whether he is in danger of becoming, very prematurely, a lame duck president.