The results tonight, said Clinton communications director Howard Wolfson on a conference call, will be "inconclusive."

The "proportional allocation process on our side is designed to keep the nominating process going for as long as possible. Despite the outcome day, which again, we think we will be largely inconclusive, we do expect to maintain our lead in overall delegates when we wake up tomorrow."

Wolfson said that the campaign has accepted several debate invitations, including a CNN debate on Feb. 27 in Ohio and a Fox News debate on Feb. 11 in Washington, D.C.

Mark Penn, Clinton's chief strategist, would not say whether the campaign predicted it would have the largest number of earned delegates tomorrow -- only that it expected to retain the edge in the total number of delegates.

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