David B. Kinney, 83, an Arlington attorney, judge and real estate investor whose proudest moment was when he was named as one of 490 people on President Richard M. Nixon's "enemies list" during the Watergate scandal, died of acute respiratory distress syndrome July 13 at Virginia Hospital Center-Arlington.

"We know he made the list because of his early support for Gene McCarthy [the "peace candidate" in the 1968 Democratic primaries], but I don't think he made any friends when he ran for Congress," said one of his sons, David Kinney.

Mr. Kinney ran as a Democrat, challenging longtime Republican Joel T. Broyhill in Virginia's 10th Congressional District. In a colorful and lively race, he accused his opponent of "16 years of obstructionism, 16 years of blatant racism, 16 years of 'no, no, no.' " Mr. Kinney urged revamping the federal tax laws, abolition of the oil depletion allowance, job-training aid for the poor, establishment of neighborhood health centers and curbs on nuclear arms. Mr. Kinney lost by a 3 to 2 margin.

Mr. Kinney, a McLean resident, was born in Belfast, N.Y., and graduated from Alma College in Michigan with a degree in economics. During World War II, he was ineligible for military service because of a medical condition, but he worked as a code breaker for the National Security Agency.

He received a law degree from George Washington University in 1952 and became a trial lawyer and substitute judge in Arlington County. In 1959, he founded the law firm now known as Bean, Kinney & Korman.

During the Vietnam War, Mr. Kinney was a political activist and defended many protesters. In the 1970s, he expanded his interests to commercial real estate and started an asset management company.

Mr. Kinney was a philanthropist throughout his life, supporting libraries, rural churches, college scholarships and several community-based organizations, including the Arlington Free Clinic and the Arlington Community Foundation. He established the Kinney First Amendment Scholarship Fund at Alma College and the Virginia state office for the Cancer Research Institute, dedicated to the development of cancer treatment methods to strengthen the body's immune defenses.

His first wife, Jean Wilson Kinney, died in 1976.

He is survived by his wife, Elizabeth B. Kinney of McLean; three children from his first marriage, Jonathan C. Kinney of Arlington, Andrea K. Greene of Purcellville and David H. Kinney of Great Falls; two stepchildren, Jo Linda Giraudo of Atlanta and Denise Giraudo Hoffert of Toronto; a sister; and four grandchildren.

David B. Kinney, 83, was proud of being named to President Nixon's "enemies list."