Eric Holder made history four years ago by becoming the first African-American U.S. Attorney General in this nation’s history.

His tenure has been marked by fierce battles with Congressional Republicans (over his handling of the “Fast and Furious” program) as well as historic successes fighting for civil rights and against domestic terrorism.

As President Obama‘s administration gears up for a second term starting in 2013, Holder is reportedly unsure if he will want to remain in office.

“Do I have some gas left in the tank?” Holder asked himself rhetorically at an appearance before law students at at the University of Baltimore. “That’s something that I’m in the process now of trying to determine.”

It is not unusual for Attorney Generals to serve for just one term. Treasury Secretary Timothy Geithner and Secretary of State Hillary Clinton are also both widely expected to depart the Cabinet following Obama’s second inauguration.