A sign at the Feb. 4 Nevada caucuses in Las Vegas. Ethan Miller/Getty Images hide caption

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Aurora Jewell, Mandi Moshay and Kirsten Dees (left to right) hold up signs following a press conference by U.S. Sen. Patty Murray (D-WA) outside at a Planned Parenthood Clinic in Seattle, on Feb. 3. Stephen Brashear/Getty Images hide caption

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A supporter of Republican presidential candidate Texas Gov. Rick Perry passes out stickers on Dec. 16 in Cherokee, Iowa. Scott Olson/Getty Images hide caption

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Former Maryland Gov. Bob Ehrlich (center, in the blue shirt) greets voters outside a polling place in Ellicott City, Md., in 2010. Ehrlich campaign manager Paul Schurick is now facing charges for allegedly discouraging voters from going to the polls on Election Day. Carolyn Kaster/AP hide caption

itoggle caption Carolyn Kaster/AP

Joseph Byrd, unemployed and living on disability, prepares to pick up groceries at the Bed-Stuy Campaign Against Hunger food pantry in Brooklyn, N.Y., in 2010. The new experimental poverty measure takes into account cost of living associated with geographic differences. Bebeto Matthews/AP hide caption

itoggle caption Bebeto Matthews/AP