CBS: Obama Takes Delegate Lead, Including Superdelegates

03/28/2008 02:45 am ET | Updated May 25, 2011

Illinois senator Barack Obama finished a series of weekend primary and caucus contests undefeated as he bested Hillary Clinton in Maine today, according to CBS News estimates.

Obama's victory in the Maine caucuses follow on the heels of his Saturday sweep in which he won Louisiana's primary contest as well as caucuses in the states of Washington and Nebraska.

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