Gaffaney and Lewis paid $433,200 for the home in April 2002. The 1,200-square-foot house was built in 1936.
Gaffaney is a research director at the U.S. Senate Democratic Policy Committee.
He received both his Ph.D. in political science and a B.A. in religion from the University of California-Los Angeles.
According to BlockShopper.com, there have been 29 home sales in American University Park during the past 12 months, with a median sales price of $793,000.
Address: 4505 Harrison Street NW
Buyer(s): Laura L McClure
Seller(s): Timothy J Gaffaney and Josephine O Lewis
Sale date: Nov. 2, 2010