Marc Thiessen writes a weekly column for The Post on foreign and domestic policy and contributes to the PostPartisan blog. He is a fellow at the American Enterprise Institute. Thiessen served as a chief speechwriter to President George W. Bush and Secretary of Defense Donald Rumsfeld, and before that as a senior aide to Senate Foreign Relations Committee Chairman Jesse Helms. He is the author of “Courting Disaster: How the CIA Kept America Safe and How Barack Obama Is Inviting the Next Attack” (2010).