In this undated photo provided by Wilmer Cutler Pickering Hale and Dorr, Ronald C. Machen is seen. Obama has nominated Machen to be U.S. attorney for the District of Columbia. The nomination was sent to the U.S. Senate for confirmation on Wednesday, Dec. 23, 2009.
(AP Photo/Wilmer Cutler Pickering Hale and Dorr) NO SALES