Condi Rice to senior staff: Don't rat out out Bolton

From today's Washington Post:

On Monday, Secretary of State Condoleezza Rice told her senior staff she was disappointed about the stream of allegations and said she did not want any information coming out of the department that could adversely affect the nomination, said officials speaking on the condition of anonymity.

http://www.washingtonpost.com/wp-dyn/articles/A1691-2005Apr19.html

Is Condi Rice obstructing the Senate's power to pass on the fitness of Bolton to serve as UN ambassador?  It seems like the Committee ought to call HER to testify.