In response to the leaks, Nixon White House staffers began a campaign against further leaks and against Ellsberg personally. Aides Egil Krogh and David Young, under the supervision of John Ehrlichman, created the "White House Plumbers", which would later lead to the Watergate burglaries. Richard Holbrooke, a friend of Ellsberg, came to see him as "one of those accidental characters of history who show the pattern of a whole era" and thought that he was the "triggering mechanism for events which would link Vietnam and Watergate in one continuous 1961-to-1975 story."