Clinton greets her supporters after winning the Pennsylvania primary. (Carolyn Cole / Los Angeles Times)
Hillary Clinton signs autographs after her victory speech. (Carolyn Cole / Los Angeles Times)
Clinton greets supporters before her victory speech in Philadelphia. (Carolyn Cole / Los Angeles Times)
Bill Clinton reacts as he listens to his wife Senator Hillary Clinton address her supporters. (Carolyn Cole / Los Angeles Times)
Chelsea Clinton applauds as her mother, Sen. Hillary Clinton, addresses her supporters. (Carolyn Cole / Los Angeles Times)
Hillary Rodham Clinton supporters react as CNN projects her as the winner of the Pennsylvania primary. (Carolyn Cole / Los Angeles Times)
Clinton supporters celebrate her victory in the Pennsylvania primary. (Carolyn Cole / Los Angeles Times)
In Blue Ball, part of Pennsylvania’s Amish territory, a horse-drawn buggy rolls past a polling station. (Carolyn Kaster / Associated Press)
Sen. Hillary Clinton greets supporters outside a polling place in Conshohocken. (Robyn Beck AFP/Getty Images)
Sen. Barack Obama says “cheese” while posing with children at a day care center in Philadelphia. (Emmanuel Dunard AFP/Getty Images)
Two girls outside a barber shop in Philadelphia watch an Obama campaign appearance. (Emmanuel Dunard AFP/Getty Images)
Poll workers stand near a wall plastered with campaign posters in Philadelphia. (Tom Mihalek / Associated Press)
Election worker Barbara Jackson holds open the curtain of a Philadelphia polling booth after helping Mary Faust vote. (Matt Rourke / Associated Press)
A voter leaves a polling place at the London Grange in London, Pa. (Keith Srakocic / Associated Press)
A worker at the Park Hyatt Philadelphia at The Bellevue -- Hillary Clinton’s election-night headquarters -- checks the podium. (Carolyn Kaster / Associated Press)
Barack Obama and his wife, Michelle, depart their jet for another campaign stop Tuesday in Pennsylvania. (Scott Olson / Getty Images)
Barack Obama and his wife, Michelle, greet Philadelphians after a visit to the Major League barber shop in that city. Obama also campaigned Tuesday in Pittsburgh. (Emmanuel Dunand AFP/Getty Images)
In Pittsburgh, Steelers’ owner Dan Rooney, left, accompanied Barack Obama and his wife, Michelle, visiting patrons of Pamela’s P&G Diner on Tuesday. Later Obama told reporters: “We closed a big gap. We were down 20. This is always an uphill climb but what we feel is we’ve made significant progress.” (Scott Olson / Getty Images)
At Pat’s King of Steaks in Philadelphia, Barack Obama and his wife, Michelle, dine on cheese steaks and fries Tuesday as Pennsylvanians go the polls. (Scott Olson / Getty Images)
Political yard signs compete in the Wynnefield neighborhood of west Philadelphia. (Jacqueline Larma / Associated Press)
Volunteers for Hillary Rodham Clinton stand outside a polling station in Butler, Pa., Tuesday. (Jeff Swensen / Getty Images)
Hillary Rodham Clinton visits outside a polling station Tuesday in Conshohocken, Pa. (Joe Raedle / Getty Images)
Hillary Rodham Clinton greets people on a visit to Boccella’s restaurant in Conshohocken, Pa. (Joe Raedle / Getty Images)
Hillary Rodham Clinton holds a news conference outside a polling place in Conshohocken, Pa., Tuesday. (Elise Amendola / Associated Press)
Clinton visits Boccella’s restaurant in Conshohocken, Pa. (Joe Raedle / Getty Images)
Election workers do the paperwork with a voter in Conshohocken, Pa. (Joe Raedle / Getty Images)
A polling station worker official assists a voter in Butler, Pa. (Jeff Swensen / Getty Images)
A woman mixes child care with voting in Butler, Pa. (Jeff Swensen / Getty Images)
Voters cast their ballots in Butler, Pa. (Jeff Swensen / Getty Images)
