Act of Treason by Vince Flynn

When presidential candidate Josh Alexander's motorcade is ambushed by a group of terrorists, the nation is thrown into turmoil. Two weeks following the attack, Alexander is carried to victory by a sympathy vote, but his assailants have not been found. On the surface it appears to be the work of al-Qaeda, despite the tremendous job that the U.S. and her allies have done eliminating terrorist cells within the heart of America. While the FBI and the rest of the government begin scouring the world for jihadists, CIA director Irene Kennedy and Special Agent Skip McMahon are presented with classified information so toxic that they consider destroying it altogether, as it contains intelligence pointing to some of the most powerful players in Washington.