Today, there is a raucous foreign policy debate within the Republican Party. Populist, realist and libertarian "America First" Republicans argue against endless wars and for fiscal responsibility, while holdover hawks continue to insist on a robust U.S. hand and military presence anywhere they can get it, no matter the cost.

In 2008, there was no debate. While broad public opinion had soured on the Iraq War and President George W. Bush's approval reached historic lows, the GOP of that era had spent nearly a decade marinating in blind support for militarism, the PATRIOT Act, and torture in the name of "counterterrorism."