John Dean, in a recent Los Angeles Times article, said the government source who gave crucial information to the Washington Post reporters whose disclosures eventually forced Nixon to resign in 1974 is gravely ill.
Those reporters, Bob Woodward and Carl Bernstein, vowed to protect Deep Throat's identity until that person's death.
"Bob Woodward, a reporter on the team that covered the Watergate story, has advised his executive editor at the Washington Post that Throat is ill," Dean wrote. "And Ben Bradlee, former executive editor of the Post and one of the few people to whom Woodward confided his source's identity, has publicly acknowledged that he has written Throat's obituary."
If Deep Throat's illness is terminal, one of the most enduring mysteries in U.S. journalism will shortly be solved.
"We'll all know one day very soon," Dean wrote.