Nixon's own reaction to the break-in, at least initially, was one of skepticism. Watergate prosecutor James Neal was sure that Nixon had not known in advance of the break-in. As evidence, he cited a conversation taped on June 23 between the President and his chief of staff, H. R. Haldeman, in which Nixon asked, "Who was the asshole that did that?" However, Nixon subsequently ordered Haldeman to have the CIA block the FBI's investigation into the source of the funding for the burglary.