Anita Dunn, who has long served as an adviser to President Joe Biden, will be the first person to leave the White House after Biden decided to stop seeking reelection, a source told CNN on Tuesday.

Dunn, who helped orchestrate the president's 2020 election against former President Donald Trump, will be leaving next week to become a senior adviser at the super PAC Future Forward and Future Forward USA Action, which support Vice President Kamala Harris.

The aide was one of the people who helped prepare Biden for the presidential debate in June, and received a lot of backlash from the first family over the president's performance. However, Biden still praised her tenure in the administration, calling her an "invaluable part" of the White House.

“She’s tough and tested, and her experience and intellect have helped us deliver historic results for the American people,” Biden said. “I deeply value her counsel and friendship and I will continue to rely on her partnership and insights as we finish the job over the next six months.”

Dunn was also reportedly left out of the conversations about Biden's departure from the race, and was only notified shortly before he announced his decision.

“[It has been] an honor and privilege to serve in this White House," Dunn told CNN. “I am grateful to President Biden and Vice President Harris for their leadership and giving me the opportunity to be part of what they have accomplished for the American people.”

Other aides have described Dunn as "unfailingly supportive," a "great mentor," and “the person who can get things done and get you answers," according to the Washington Post.

Chauncey McLean, the president of Future Forward, said Dunn was a "great asset" for their team as they work to elect Harris to the Oval Office this November. 

Future Forward has committed at least $300 million to support Harris as the Democratic Party's presumptive presidential nominee.

Misty Severi is an evening news reporter for Just The News. You can follow her on X for more coverage.