A woman pays her respects at a statue of Joe Paterno outside Beaver Stadium on the Penn State University campus in State College, Pa., after learning of his death on Sunday. Gene J. Puskar/AP hide caption

itoggle caption Gene J. Puskar/AP

The Syncrude tar sands mine in Alberta, Canada. Alberta's tar sands would supply the oil for the prospective Keystone XL pipeline. Todd Korol/Reuters/Landov hide caption

itoggle caption Todd Korol/Reuters/Landov

The Syncrude tar sands mine north of Fort McMurray, Alberta, is seen in November. Alberta's tar sands would supply the oil for the prospective Keystone XL pipeline. Todd Korol/Reuters/Landov hide caption

itoggle caption Todd Korol/Reuters/Landov

Rick Santorum receives a call at his campaign headquarters during his Senate re-election bid in 2006. The former senator was attempting to keep his Pennsylvania Senate seat, which he later lost to Democrat Bob Casey Jr. Jeff Swensen/Getty Images hide caption

itoggle caption Jeff Swensen/Getty Images

Distillation towers, tanks and other equipment at Sunoco's sprawling refinery on the banks of the Schuylkill River on Aug. 3, 2009. Sunoco is selling off two refineries and, in September, announced it would get out of the refining business. Richard Richtmyer/AP hide caption

itoggle caption Richard Richtmyer/AP

House Minority Leader Rep. Nancy Pelosi talks to reporters in the U.S. Capitol on Friday. Pelosi was critical of Speaker John Boehner and the GOP leadership for recessing the House without passing extensions of the payroll tax cut and unemployment benefits, both set to expire at the end of the year. Chip Somodevilla/Getty Images hide caption

itoggle caption Chip Somodevilla/Getty Images

Former U.S. Sen. Rick Santorum greets voters this summer in Iowa. The Republican presidential hopeful has spent most of his professional life in politics. Chip Somodevilla/Getty Images hide caption

itoggle caption Chip Somodevilla/Getty Images

A woman casts her ballot during early voting in Toledo, Ohio. Members of the silent generation are more likely to vote for Republicans than for Democrats, according to a recent study by the Pew Research Center. J.D. Pooley/Getty Images hide caption

itoggle caption J.D. Pooley/Getty Images

Union posters can be found all over the Occupy Philadelphia protest site near City Hall. Protesters and local union leaders meet regularly to discuss tactics and how to involve labor.

Jeff Brady/NPR hide caption

itoggle caption Jeff Brady/NPR

Chapman Corp. is expanding to take advantage of extra business it expects to get in coming decades because of increasing production in the Marcellus Shale play.

Jeff Brady/NPR hide caption

itoggle caption Jeff Brady/NPR

A protester marches on Friday in New York City as part of larger demonstration focused on corporations, wealth and income distribution. Mario Tama/Getty Images hide caption

itoggle caption Mario Tama/Getty Images

Employees at Barber's Farm in Middleburgh, N.Y., shovel muddy tomatoes left in the wake of flooding from Hurricane Irene. Jeff Brady/NPR hide caption

itoggle caption Jeff Brady/NPR

Marvin Hardy drives screws into a sheet of plywood on Washington Mall in Cape May, N.J., on Friday, as he boards up storefronts in preparation for Hurricane Irene. Mandatory evacuations were under way affecting nearly 1 million residents and visitors in Cape May County, coastal Atlantic County and Long Beach Island, N.J. Mel Evans/AP hide caption

itoggle caption Mel Evans/AP

Sen. Pat Toomey (R-PA) addresses the Conservative Political Action Conference in Washington in February. Alex Brandon/AP hide caption

itoggle caption Alex Brandon/AP