(CNN) - CNN has confirmed that David Wilhelm, Bill Clinton’s 1992 campaign manager, will endorse Barack Obama’s presidential bid Wednesday afternoon.
Wilhelm, a former chair of the Democratic National Committee, is a superdelegate to the party’s convention this summer. He had not previously announced his support for either of the two remaining White House hopefuls this cycle.
Obama has captured a narrow lead in the overall delegate count, but still significantly trails Hillary Clinton in the race to capture superdelegates, party leaders and elected officials who can choose to support any candidate they wish regardless of their state’s primary season vote.
It is possible the support of superdelegates may prove decisive this cycle.
Obama campaign manager David Axelrod called the nod “very important,” saying the seasoned campaign strategist “knows Ohio backwards and forwards, so it’s a hugely valuable endorsement for us. He’s going to be a big part of our team.”
He added that Wilhelm represents a move of former Bill Clinton supporters into Obama’s camp.
The campaign tells CNN Wilhelm’s endorsement will come during a 1 p.m. conference call.
– CNN's Candy Crowley and Chris Welch contributed to this report