Biden names Ron Klain as his White House chief of staff

(CNN) President-elect Joe Biden on Wednesday tapped Ron Klain to be his incoming chief of staff, elevating his longtime aide to one of the most powerful positions in the White House, officials familiar with the move told CNN.

Klain is one of Biden's most trusted campaign advisers and was long seen as the most likely pick for the top job. He previously served as chief of staff to Vice President Al Gore during the Clinton administration and Biden during his tenure as President Barack Obama's vice president.

Klain has accepted the offer and will begin a new era of service to Biden, officials said, with a formal announcement set for Thursday.

Klain brings unique expertise to this moment defined by the ongoing coronavirus crisis. The Democratic operative was appointed by then-President Barack Obama to lead the response to the Ebola crisis in 2014.

Klain's experience leading the Obama administration's response to that public health threat is seen as an asset.

During the campaign Klain was one of the public faces of the Biden team's response to the pandemic.

"The Trump administration's response to this crisis has clearly failed," Klain said in a campaign video attacking Trump's response to coronavirus released in July. "Donald Trump has waved the white flag in the fight against coronavirus."

Klain graduated from Harvard Law School in 1987 and was the editor of the Harvard Law Review. He would later serve as a law clerk to Supreme Court Justice Byron R. White. Klain was appointed by then-Sen. Biden to serve as chief counsel for the Senate Judiciary Committee from 1989 to 1992, a tenure that included the contentious hearings around the nomination of Clarence Thomas to the Supreme Court.

Klain has become the go-to operative for debate preparation for Democratic candidates dating as far back as Bill Clinton. His work with Clinton led him to hold a number of different roles in the Clinton administration, including chief of staff to Gore.

Klain also worked for Gore's failed presidential bid, including his recount effort in Florida, in which he served as general counsel.

After years as a partner at a Washington law firm and as general counsel of a venture capital firm, Klain was tapped by Biden in 2008 to be his chief of staff.

Klain also worked as a senior adviser to Hillary Clinton's 2016 campaign, focused primarily on preparing her for debates.