Killefer is a former Treasury Department official who worked to modernize the IRS. In the newly created position, she would have worked in the OMB and overseen the efficiency of federal programs and spending.
She is the third Obama apointee to run into tax difficulties. Treasury Secretary Timothy Geitner admitted he failed to pay thousands in back taxes, but later rectified the mistake; Congress soon after confirmed him. Tax trouble has also hit former Sen. Tom Daschle, Obama's pick for health and human services secretary. The President publicly backed Daschle after the revelations, but Congress hasn't confirmed Daschle yet.
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