With the success of the Affordable Care Act on the line, and with the drive to make same-sex marriage legal, President Obama pushes his administration to new limits.

The president works to carve out his administration's foreign policy including a tough decision about the killing of Osama Bin Laden; at home his domestic agenda is challenged by the second most deadly school shooting in American history.

Anti-Obama sentiment is on the rise, showing signs of a resurgence of racism in America. A white supremacist opens fire in a black church and it is up to the president to unify a divided country in mourning.

An unlikely candidate gave America hope and went on to become the first African-American president in U.S. history. Once in office, hope was questioned as racism, fear and political opposition try to upend Obama's presidency.