Presidents George H. W. Bush and George W. Bush both led the United States through watershed events in foreign relations: the end of the Cold War and the terrorist attacks of September 11, 2001. Many high-level cabinet members and advisers played important foreign policy roles in both administrations, most notably Dick Cheney, Colin Powell, and Condoleeza Rice. Both presidents perceived Saddam Hussein as a significant threat and took action against Iraq. But was the George W. Bush administration really just "Act II" of George H. W. Bush's administration?

In The Gulf, Michael...