What Are the Real Causes of Rising Gas Prices?

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Americans are suffering from increased pain at the gas pump, and Republicans are blaming President Obama. What are the real causes of increased gasoline prices? Can the President persuade voters it's not his fault and that he's doing all that he can? Also, Mitt Romney's big win in Illinois, and new results show that aspirin can fight cancer, but it's not cost free.

Banner image: Eric Lian fuels up his car at a gas station on March 16, 2012 in Miami Beach, Florida. Photo by Joe Raedle/Getty Images