During a conference call on Wednesday morning, David Plouffe, the campaign manager for Barack Obama, pointed to what he called a "warning sign" for Democrats: the exit polls from Mississippi, where Obama on Tuesday beat Hillary Clinton 61 to 37 percent. Plouffe noted that when Democratic voters who participated in this primary were asked "which candidate do you think is honest and trustworthy," 50 percent said Clinton was not. Seventy percent of the Democrats polled said Obama was honest and trustworthy. That's a 20-point integrity gap--and its among Democrats. Certainly, many Democrats elsewhere--such as in states where Clinton won big--do not share this distrust of Clinton. But Plouffe is right: numbers like these ought to give Democrats, be they voters or super-delegates, pause.

Another interesting factoid from the exit polls: who's the more vicious candidate. The exit pollsters asked Democrats in Mississippi if either Obama or Clinton has attacked "the other unfairly." Sixty-one percent said that Clinton has; 39 percent said that Obama has. So in addition to the integrity gap, there was a 22-point nasty gap. Again, Democratic voters in states that went for Clinton may not see this the same way. And given that the Mississippi Democratic electorate included many African Americans, this number may reflect a sentiment held more by black Democrats than white Democrats. (Remember South Carolina?) Nevertheless, all this is food for thought for Democrats: do they want a presidential candidate that many voters within their own ranks consider unfair and not honest?

For more of a breakdown of the Mississippi vote--particularly the racial component (short answer: Clinton won whites; Obama won blacks)--see my colleague Jonathan Stein's posting at MotherJones.com.