Foreign aid: Following Nov. 12's debate, during which Santorum differed from most other candidates by defending U.S. aid to Pakistan, the candidate accused his opponents of "pandering to an anti-foreign aid element out there." He feels that politicians have contributed to skewing voters' view of how much money actually goes to foreign aid. "When I tell them it's less than a half a percent [of the federal budget], people are shocked," he said.

Iran/nukes: Santorum has stated that an Israeli military strike on Iran is inevitable and that the United States should support it when it comes. He has made the case for years that Iran poses the greatest threat to U.S. national security -- a threat on par with that posed by the Soviet Union during the Cold War. In 2004, he authored legislation to support democracy movements in Iran. He blames the Obama administration's failure to support the Green Revolution opposition movement for its ability to overthrow the Iranian regime.

Trade: Santorum did not support North American Free Trade Agreement while in Congress but believes that "most of the free trade agreements we've entered into have not contributed greatly to [American unemployment]." Nevertheless, he supports free trade agreements in principle, not just on economic grounds, because they "build relationships that are important from a national security point of view."

War on terror/detainees: Santorum has written that the "fight against Islamic fascism is the great test of our generation." He supports keeping Guantánamo open and using "enhanced interrogation" techniques like waterboarding. In a May radio interview, he argued that the information that led to the killing of Osama bin Laden would never have been acquired "if it had not been gotten ... from people who were subject to enhanced interrogation" and that Sen. John McCain -- an opponent of waterboarding and himself a victim of torture -- "doesn't understand how enhanced interrogation works."

Environment: Santorum describes climate change as "junk science" and a "beautifully concocted scheme" for the left to "regulate your life." The Pennsylvanian is also a staunch supporter of coal power.

Russia/reset: Santorum hasn't spoken much about Russia policy on the campaign trail. As senator, he supported NATO enlargement into Eastern Europe.

Arab Spring: The staunchly pro-Israel Santorum is strikingly pessimistic on this year's revolutions in the Arab world, predicting that "recent dislocation of the old order in the Middle East will usher in a new one, and anti-Israel elements are working overtime all across the world to take advantage of this opportunity."

Other issues: Santorum's Christian faith often factors heavily into his foreign-policy rhetoric. For instance, while discussing Europe's current problems in July he said, "You go to Europe; church attendance rates in the single digits -- secular society. Why? Because the government co-opted faith, because faith and the government are intertwined."

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