 Mayorkas named four members to the bipartisan panel. Janet Napolitano, who served as DHS Secretary in the Obama administration, two former George W. Bush administration officials, former Homeland Security Advisor Francis Townsend, and former Deputy Attorney General Mark Phillip. The fourth member is Chief David Mitchell, a former Maryland State Police Superintendent. The panel's 45-day review will examine the planning by the Secret Service and its state and local law enforcement partners,