The networks all call Mississippi for Barack Obama. The margin in early returns is not huge, but may widen as the night goes on. (If not, expect Hillary Clinton to claim this as a sign her opponent “could barely eke out a victory in a must-win state.”) Most interesting (and worrying for Democrats) are these figures from the exit polls: 48% of Democrats think Clinton is not honest and trustworthy and only 26% of whites voted for Obama (but 90% of blacks did). Will Clinton’s negatives be sky high by the end of the primary race? Has Obama lost his bi-racial appeal? Both may be true.