Age: 48
Occupation: President of the United States
Previous TIME 100 Appearances: 4
President Obama's first year in the Oval Office was rocky, as he struggled to fight two wars, right a listing economy and enact an ambitious domestic agenda. But by winning a bitter partisan battle over health care, he became the first Democratic President in 40 years to enact a historic piece of social welfare legislation an achievement that bolsters his presidency as he braces for the coming fight over financial re-regulation.