Biden campaign manager Jen O'Malley Dillon said Thursday on a briefing call with reporters that ``the story of today is going to be a very positive story'' for their campaign, but cautioned that as the counting continues, ``we need to allow it to get done and get done well.''

Joe Biden's campaign is expressing optimism at the ultimate result of the election but warning supporters to ``stay patient and stay calm'' as vote counting continues.

Biden campaign manager Jen O'Malley Dillon said Thursday on a briefing call with reporters that ``the story of today is going to be a very positive story'' for their campaign, but cautioned that as the counting continues, ``we need to allow it to get done and get done well.''

She says the campaign expects their lead to fluctuate in some states as more votes come in.

O'Malley Dillon also charged that legal challenges by President Donald Trump's campaign to halt vote counting in some states and seek a recount in Wisconsin are a ``flailing strategy'' that are an ``attempt to distract and delay'' from the results of the election.

The Associated Press is not calling the presidential race yet because neither candidate has secured the 270 Electoral College votes needed for victory.

Several key states were too early to call, Pennsylvania, Georgia, North Carolina and Nevada.