Voters Head to the Polls Tuesday Night

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The field of democratic presidential contenders could go from seven to two or three by the end of the day.

That's how much is at stake in Tuesday's seven-state democratic primaries or caucuses.

Voters in Arizona, Delaware, Missouri, Oklahoma and South Carolina are casting ballots in primaries.

Front-runner John Kerry made a stop in Arizona before heading to Washington State, which holds primary elections next week.