Page last updated at 04:13 GMT, Wednesday, 23 April 2008 05:13 UK

In pictures: Pennsylvania primary

Hillary Clinton celebrates her primary win in Philadelphia on 22 April 2008

Hillary Clinton tells supporters she is no quitter as she celebrates her widely predicted victory over Democratic rival Barack Obama in the state of Pennsylvania.

Clinton supporters cheer after news of her win comes through at a Philadelphia hotel on 22 April 2008

Mrs Clinton has won most of the big state contests but still trails in the delegate count and in the total votes cast. The state's Democrats voted for the person they want to run for president.

Barack Obama's post-primary speech in Evansville, Indiana

Mr Obama had predicted he would lose the state but said he made strides in reducing Mrs Clinton's initial lead. He rejects her claim that he could not win the big swing states in November's election.

Chelsea Clinton and her father, ex-President Bill Clinton, applaud Hillary Clinton's primary win in Philadelphia on 22 April 2008

The former first lady told cheering supporters at a victory rally in Philadelphia that she had beaten a "formidable opponent" who had outspent her three-to-one.

Barack Obama campaigns in Pennsylvania

Illinois senator Mr Obama had shattered campaign spending records in Pennsylvania as he sought to floor the former first lady with a knockout blow.

Omar Graybill fills in a ballot paper before voting in Pennsylvania's democratic Presidential primary

But the state's demographics - with plenty of blue-collar, white and older voters - once again proved ideal for Hillary Clinton.

Voters queue in Philadelphia to vote in Pennsylvania's Democratic presidential primary

Polling stations in Philadelphia included a private garage. The tight contest has prompted 200,000 people to register as Democratic voters this month and spurred high turnouts in the primary.

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