(CNN) - Independents and crossover Republicans are keeping the Democratic race in Missouri extremely tight.
Clinton holds an 8-point lead over Obama there among Democrats who voted in the primary. But Missouri is one of those primaries that allows Independents and Republicans vote in the Democratic primary, and those voters are overwhelmingly supporting Obama.
The Democratic base is split between Obama and Clinton, but Independents clearly favor Obama.
–CNN Senior Political Analyst Bill Schneider