Charles Colson, President Richard Nixon’s aide who was involved in the Watergate scandal and later became an evangelical preacher, has died aged 80.

Charles Colson was known as the “hatchet man” for Richard Nixon and served seven months in jail for his role in discrediting a political opponent.

Later, Charles Colson started a prison ministry and campaigned for penal reform.

Charles Colson, a father-of-three, died in hospital in Fairfax, Virginia, of complications from a brain haemorrhage.

Charles “Chuck” Colson had a reputation as a hard-nosed political operator and was once described by President Richard Nixon as the son he never had.

He helped the Republican candidate to a landslide victory in 1972, saying he would “walk over his own grandmother” to ensure Richard Nixon’s re-election.

Charles Colson, President Richard Nixon’s aide who was involved in the Watergate scandal and later became an evangelical preacher, has died aged 80

In 1971, Charles Colson wrote a now infamous “enemies list” naming his boss’s major political critics and opponents.

His role in the Watergate scandal was limited, but he pleaded guilty to obstructing justice after he was involved in earlier efforts to discredit Daniel Ellsberg, who had leaked secret government documents about the Vietnam War, which became known as the Pentagon Papers.

A break-in was organized at the office of Daniel Ellsberg’s psychiatrist, in a search for documents which could be used to blacken his reputation.

President Richard Nixon’s right-hand man served seven months in jail, although he was not convicted of organizing the Ellsberg or Watergate break-ins themselves.

Charles Colson came out of prison claiming to be a new man, renouncing the political machinations of his past and embracing his religious faith.

He spent the next 35 years as a leading campaigner for prison reform, founding the Prison Fellowship Ministries in 1976.

Charles Colson was named as one of Time magazine’s “25 Most Influential Evangelicals in America” in 2005, having written over 200 books in his lifetime.

Later in life Charles Colson lived in Naples, Florida, and in 2000 the state Governor Jeb Bush restored his civil rights, including the right to vote, which he lost after he was convicted.