Decision 2012: Romney, Santorum Trade Jabs in Fiery Debate

In what may be the last debate in Republican presidential race, Mitt Romney and Rick Santorum traded shots in the battle for next Tuesday's key primary elections in Arizona and Michigan. And while Romney and Santorum were whipping each other, trailing candidates Newt Gingrich and Ron Paul took the opportunity to try to trip the frontrunners in their neck and neck race for Michigan.

Class discussion: Romney rapped Santorum in the debate for supporting earmarks when he was a U.S. senator, and Gingrich hit Romney for benefiting from earmarks. Find news reports about earmarks. What are they? How do they work? How much do they cost? The debate audience groaned over a question about birth control. Find recent reports on the topic. What are the issues? How might the controversy impact the election?