Veteran Washington insider, Ashton Carter, is an independent thinker whose opinions have not always aligned fully with those of the president.
A US jury has found that white police officer Darren Wilson acted in self defence when he shot and killed black teenager Michael Brown.
The world's 20 major economies have agreed to a plan aimed at pushing their combined growth beyond the 2% they were initially targeting.
Midterm poll defeat will rattle presidential heir-apparent Hillary Clinton.
Obama may struggle to persuade African leaders to step down timeously at leadership summit.
As people celebrate the Chinese New Year and Latin America's carnival, Barack Obama will give an update on the State of the Union in the week ahead.
The White House has defended drone strikes against al-Qaeda, insisting they complied with US law and the Constitution, even if Americans are targeted.
After an election race filled with suspense, Mitt Romney's supporters were left disappointed as Barack Obama secured another term as US president.
Impressive poll results reveal that the Republican is way ahead of his fellow election contenders.