In Tight Democratic Race, Could Campaign Donations and Personal Views Influence Potentially Decisive Superdelegate Vote?With neither Democratic presidential candidate expected to win the 2,025 delegates needed to clinch the nomination, it's all coming down to superdelegates, the nearly 800 former elected officeholders and party officials who are technically free to choose who they like. While Obama leads in the overall delegate count and among pledged delegates, Clinton has more superdelegate support. About 300 of the 795 superdelegates have yet to take sides. And both campaigns are in a heated battle to win their support. In fact, many of the superdelegates have already been plied with campaign contributions by Barack Obama and Hillary Clinton, according to a new study by the Center for Responsive Politics. [includes rush transcript]