GREENVILLE, S.C. – Former U.S. Rep. James R. Mann, D-S.C., remembered for his work on the articles of impeachment against former President Nixon, has died at age 90, his son said Tuesday.

He died Monday in Greenville after a battle with Alzheimer’s disease, James R. Mann Jr. said.

Mann, who served from 1969 to 1979, helped craft the articles of impeachment against Nixon, forging a consensus with Republicans and two other Southern Democrats on the House Judiciary Committee, his son said.

Mann’s son noted that his father is often remembered for saying during the hearings, “If there be no accountability, another president will feel free to do as he chooses, but the next time, there may be no watchmen in the night.”