Despite improvements in employment and the economy, President Obama's poll ratings are slipping again. Is it the increasing cost of gasoline? Gas prices can make a big difference in presidential campaigns. Just ask Jimmy Carter. As prices soar toward $4 a gallon, Newt Gingrich claims he can bring them down to $2.50. How much power does the President have over the price at the pump? Steven Mufson reports on energy for the Washington Post.
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