CNN, MSNBC declare Obama presumptive nominee

Just as polls closed in South Dakota, where residents were voting in the state's Democratic primary, both CNN and MSNBC made a call. Surprisingly, though, it wasn't about the results of the primary, but about the nomination itself -- both declared Barack Obama the presumptive Democratic nominee based on their projections of the delegate allocation from the state. The Associated Press and ABC News had each made a similar call earlier.