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By David Jackson, USA TODAY

Labor Secretary Hilda Solis is leaving her job, President Obama said Wednesday.

"Over the last four years, Secretary Solis has been a critical member of my economic team as we have worked to recover from the worst economic downturn since the Great Depression and strengthen the economy for the middle class," Obama said.

Solis is the fifth Cabinet-level to announce his or her resignation prior to the start of Obama's second term on Jan. 20.

Secretary of State Hillary Rodham Clinton, Defense Secretary Leon Panetta, Treasury Secretary Timothy Geithner, and Environmental Protection Agency administration Lisa Jackson have also announced their departures.