US President Barack Obama announces his Chief of Staff Jack Lew (R) as his nominee for Treasury Secretary, in the East Room of the White House in Washington, January 10, 2013. If confirmed by the Senate, Lew will replace Tim Geithner (C).
Barack Obama has come under fire for lacking diversity in his cabinet following a series of nominations that do not include any women or minorities.
On Thursday, Obama nominated his chief of staff Jack Lew - a 57-year-old white guy - to head up the treasury department when current Secretary Timothy Geithner leaves.
And Hilda Solis, his Hispanic labour boss, announced she was leaving Wednesday, which follows on the heels of the resignation of Lisa Jackson, an African American as the head of the Environmental Protection Agency.
Steven Chu, Obama's energy secretary and an Asian American, is also expected to depart the White House soon.
The most famous woman in Obama's team, Hillary Clinton, is also stepping down.
Filling the holes, Obama's recent appointments include Lew, John Kerry as Secretary of State to replace Clinton, Chuck Hagel at defence, and John Brennan as CIA director.
All white men.
White House spokesman Jay Carney said the president isn't finished filling out his second-term cabinet and people should hold off judgment.
"These stories are in reaction to a couple of appointments," Carney told reporters recently, adding Obama "values diversity ... but the goal in the end is to find the very best individuals."
In August 2011, Obama signed an executive order demanding federal government departments increase their numbers of women and minorities because he felt the federal government should lead by example.