President Barack Obama will nominate Mary Jo White to head the Securities and Exchange Commission in an announcement later today, White House Press Secretary Jay Carney confirmed Thursday.

"The president believes the appointment [of White] demonstrates the commitment to airing out Wall Street ... to assure that we have rules of the road that are necessary and are being enforced in a way so we don't have the kind of financial crisis that we had," Carney said during a press briefing.

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