"I am not going to be carried out feet first. I do not want people to say I stayed too long," 87-year-old Democrat John Dingell, who has been on the job in the House of Representatives since 1955, told the Detroit News.
Dingell became the longest-serving US lawmaker last June, when he began his 20,997th day in office, eclipsing the previous milestone held by late Senator Robert Byrd of West Virginia.
But the Michigander who has served under 11 presidents and cast more than 25,000 votes expressed irritation with the bickering in today's Congress, saying he now finds it "obnoxious" to serve in the House.
"This is not the Congress I know and love. It is hard for me to accept, but it is time to cash it in," he said.
Dingell was expected to announce his retirement at a luncheon in suburban Detroit.
The hard-nosed legislator, who once made Republican adversaries or witnesses at his hearings quiver in their wingtips, at the age of 29, claimed the seat that his father held for more than two decades until his death.
"In the old days there were rules, comity was practised and compromise was not a dirty word. Today, you are sent down here to fight, not work," he had said.
While he makes a point of remaining civil with colleagues, Dingell has had his share of battles. As chairman of the Energy and Commerce Committee for 13 years until 1994 he wielded great power.
