A new Rasmussen poll of Pennsylvania gives Hillary Clinton a five-point lead going into tomorrow' primary, a potential increase from her lead three days ago:

Clinton 49% (+2)
Obama 44% (+0)

This is the fifth consecutive Rasmussen poll that gives Clinton only a single-digit lead here. At this point, how the seven percent undecideds break will make the difference between a big Clinton victory or perhaps even an Obama upset win.