Who's he and why say that?

Duberstein, for those who don't know, is currently a Washington lobbyist, CEO of the eponymously named Duberstein Group. But, more significantly, he was Ronald Reagan's last chief of staff after then-Sen. Howard Baker stepped in to to replace the Nancy-sacked Don Regan. And, it is because of that position that he has a unique perspective on the Mark Felt/"Deep Throat" saga.

Some quick background: Frankly, I tired rather...