Clyburn Endorses Obama

House Majority Whip Jim Clyburn, D-S.C., has endorsed Barack Obama, CBS News confirms. Clyburn is the highest ranking African-American member of Congress.

Clyburn told the Associated Press that he was calling on South Carolina superdelegates to back Obama, who is now just 44 delegates shy of clinching the Democratic nomination, according to the latest CBS News count.

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    Scott Conroy is a National Political Reporter for RealClearPolitics and a contributor for CBS News.