Sessions said his decision to accept the intelligence committee's invitation to appear was due in part to Comey's testimony. He wrote that "it is important that I have an opportunity to address these matters in the appropriate forum." He said Deputy Attorney General Rod Rosenstein would appear before the subcommittees.
Briefing congressional appropriators on the Justice Department's budget is a critical part of the attorney general's job. The fact that Sessions would delegate that task to his deputy showed the Russia investigation was distracting him from his core duties.