Danese Kenon/The Indianapolis Star, via Associated Press

Andrew Jacobs Jr. was first elected to the House of Representatives in 1964.

Former Congressman Andrew Jacobs Jr., a Democrat from Indiana who fought in the Korean War and was an early opponent of the Vietnam War, died on Saturday at his home in Indianapolis. He was 81.

His death was confirmed by Gary Taylor, a former campaign manager.

Mr. Jacobs was first elected to the House of Representatives in 1964, but lost his seat in 1972 along with several other Democratic members of Congress in President Richard Nixon's landslide re-election win.

In 1974, months after the Watergate scandal forced Nixon's resignation, Mr. Jacobs regained his House seat and served until his retirement in 1997, representing a district in his native Indianapolis.

A former Marine, Jacobs was among the early critics of the Vietnam War. He also helped write the 1965 Voting Rights Act, a touchstone of civil rights legislation, and was a longtime member on the House Ways and Means Committee.

"Congressman Andy Jacobs personified the kind of principled and compassionate leadership that Hoosiers most admire & will be greatly missed," Governor Mike Pence of Indiana, a Republican, said on his Twitter page.

Mr. Jacobs suffered a number of health problems in recent years, Mr. Taylor said.

He is survived by his wife, Kim Hood Jacobs, an Emmy Award-winning television reporter and documentary producer, and sons Andy and Steven Jacobs.

His father, Andrew Jacobs, was also a Democratic congressman from Indiana, serving in the House from 1949 to 1951.