Today's poll - cumulative leads in key states for the Democratic nomination.
These reflect the numbers from the last 1-2 months on average in numerous polls, as detailed in the RealClearPolitics polls.
Iowa Sanders leads by 4.4
NH Sanders leads by 9.5
NV Biden leads by 5.7
SC Biden leads by 13.5
CA Sanders leads by 5.7
In both NV and SC, Biden is dropping sharply in the last 2-3 weeks.