Diane Sawyer was suffering from 'exhaustion' while hosting last night's marathon election special on ABC, according to senior network sources.

The legendary TV anchor, 66, left many viewers asking if she had begun celebrating yesterday's election results a bit too early.

Taking the helm of ABC News' coverage, the veteran journalist spoke more slowly than usual - while seeming to prop herself on outstretched arms at the anchor desk she shared with George Stephanopoulos.

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