Barack Obama is the President of the United States and commander-in-chief of the military. Joe Biden is Vice President and assumes the presidency if the President can no longer serve. The Cabinet consists of the President's closest advisors on various issues and departments, including Hillary Clinton as Secretary of State, Timothy Geithner as Treasury Secretary, and Eric Holder as Attorney General. The Supreme Court has nine justices led by Chief Justice John Roberts with other members including Antonin Scalia, Anthony Kennedy, Clarence Thomas, Ruth Bader Ginsburg, Stephen Breyer, Samuel Alito, Sonia Sotomayor, and Elena Kagan.