One tactic he uses is to call people before the grand jury again and again.
He called both men before the grand jury on Tuesday.
Mr. Rice was called before the grand jury as part of that investigation.
He previously called another retired officer before the grand jury to explore that subject.
The President then was specifically asked whether he knew that his aides were likely to be called before the grand jury.
They were not called before the grand jury, although it is possible that some of their clients were.
Two of his relatives have been called before the grand jury.
Although he told his story to the police and the state's attorney's office, he was never called before the grand jury.
He was never called before the federal grand jury that investigated the Lewinsky affair.
Mr. Cooper said he had been told that there was no reason for him to expect to be called before the grand jury again.