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Keystone State Keys

Pennsylvania's Democratic primary on April 22 could be a win-or-go-home contest for Hillary Clinton--and a chance for Barack Obama to show he can compete in a big, industrial battleground state. How the pros see the fight shaping up:

Where the Votes Will Come From

20% PHILADELPHIA

15% PHILADELPHIA SUBURBS

15% Pittsburgh area

10% LEHIGH, BERKS AND NORTHAMPTON COUNTIES

40% REST OF THE STATE

How They Can Win

BARACK OBAMA Run up huge margins in Philadelphia and with African-American voters statewide; achieve parity in Philadelphia suburbs; win big with college kids

HILLARY CLINTON Win suburban women as well as...

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