(CNN) - Pennsylvania voters must now decide who will be a stronger Democratic presidential nominee in the general election against John McCain. The latest polls show Hillary Clinton ahead of Barack Obama - but those same polls show about 7 percent of the likely Democratic voters remain undecided. They could certainly tip the balance.
State officials also say that hundreds of thousands of new voters have registered – many of them about to vote for the first time. They represent a new element of the political equation, and they, too, could tip the balance. They represent a surprise factor.
In other words, we could be in for a long night tomorrow as the results come in. I will be anchoring our coverage from the CNN Election Center, beginning with The Situation Room at 4 p.m. ET.
If Clinton wins, even by a narrow margin, we will then gear up for the May 6 primaries in North Carolina and Indiana. I don’t think she would drop out. If she loses, however, her campaign would have to make a very tough decision.
On the substantive issues – like the economy, health care, housing, crime, the war in Iraq and other foreign policy matters - the two candidates have spelled out their visions in great detail on their respective websites. There are differences between the two of them, but not necessarily huge differences. That’s why you have heard so much from the candidates and their surrogates about so many other marginal matters.
The real differences, of course, are between the two Democratic candidates, on the one hand, and John McCain on the other. This idisagreements s very clear irrespective of whoever wins the Democratic nomination. In the fall, there will be very big between the two candidates on such sensitive issues as the war in Iraq, abortion rights for women, taxes, guns and a whole lot more.