The New Nation - Internet Edition

AFP, Philadelphia

Hillary Clinton must win Tuesday's Pennsylvania primary, but she needs to do more than simply scrape past rival Barack Obama to rescue her trailing White House bid.

The New York senator is tipped for victory in late opinion polls, but many observers think it will take a double-digit triumph to stave off more calls for her to quit the epic Democratic nomination race.

She also needs a fresh burst of momentum ahead of the next round of contests in Indiana and North Carolina on May 6, which are followed quickly by the last six voting showdowns of the epic nominating battle into early June.