At Mother of Sorrows Catholic Church in Murrysville, Pa., on Wednesday evening, worshipers held candles as they prayed for those injured in a stabbing attack at the local high school. Connor Mulvaney /Pittsburgh Post-Gazette/Landov hide caption

itoggle caption Connor Mulvaney /Pittsburgh Post-Gazette/Landov

Emergency responders gather in the parking lot on the campus of Franklin Regional High School in Murraysville, Pa., on Wednesday after an attack there left at least 20 people, nearly all of them students, injured. Most suffered stab wounds or lacerations. Keith Srakocic/AP hide caption

itoggle caption Keith Srakocic/AP

Ashante Thurston, John Riascos and Julieth Riascos talk with Mario Ricart, a private insurance agent, about buying health insurance at a kiosk at the Mall of the Americas in Miami last year. Joe Raedle/Getty Images hide caption

itoggle caption Joe Raedle/Getty Images

Before the voter ID law was put on hold, this Penndot Drivers License Center in Butler, Pa., displayed signs promoting the requirement for voters to show an acceptable photo ID at the polls. Keith Srakocic/AP hide caption

itoggle caption Keith Srakocic/AP

Pennsylvania Gov. Tom Corbett speaks at St. Christopher's Hospital for Children in Philadelphia on Wednesday. Corbett visited the hospital to promote his Healthy Pennsylvania initiative. Matt Rourke/AP hide caption

itoggle caption Matt Rourke/AP

Susan Mull is a substitute teacher in Lancaster County, Pa. She's lived with HIV for 21 years, the past 13 without health insurance. She says an expansion of Medicaid in Pennsylvania would be "life-changing." Jeff Brady/NPR hide caption

itoggle caption Jeff Brady/NPR

Republican presidential nominee Mitt Romney pauses while speaking at a campaign rally at the Patriot Center at George Mason University in Fairfax, Va., on Monday. Charles Dharapak/AP hide caption

itoggle caption Charles Dharapak/AP

Emily Goldberg holds up a sign during the NAACP voter ID rally opposing Pennsylvania's voter ID law last Thursday in Philadelphia. With her is her 2-year-old daughter, Willa. Michael Perez/AP hide caption

itoggle caption Michael Perez/AP

U.S. Communists have been running for office for decades. Above, the Party's presidential ticket in 1936. Ken Rudin collection hide caption

itoggle caption Ken Rudin collection