The CEO of the Democratic National Committee (DNC) is leaving the organization after less than a year, NBC News reported Monday.

Jess O’Connell, a longtime Democratic operative, is leaving for personal reasons after joining the group in May, one DNC official told NBC, but O'Donnell didn’t give a specific reason for her departure in an email to DNC staffers Monday.

The DNC has struggled in its fundraising in the past year, while Republicans raked in the cash throughout 2017.

"Rebuilding the party will take time. While it isn't an easy task, we developed a strategy, we implemented it, and we won races up and down the ballot in 2017," O’Connell said in a statement to NBC.

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"While I've made the decision to pass the baton, our work remains far from over and under Tom Perez Thomas Edward PerezClinton’s top five vice presidential picks Government social programs: Triumph of hope over evidence Labor’s 'wasteful spending and mismanagement” at Workers’ Comp MORE's leadership and direction, our party will continue to build on the progress we've made in 2017,” she continued.

Perez, the DNC chairman, thanked O’Connell for her work in an email to DNC staff, saying the “Democratic Party was broken” when she joined the organization.

O’Connell joined the group as Democrats were still recovering from Hillary Clinton Hillary Diane Rodham ClintonBiden leads Trump by 36 points nationally among Latinos: poll Democratic super PAC to hit Trump in battleground states over coronavirus deaths Battle lines drawn on precedent in Supreme Court fight MORE’s surprise loss to President Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE in the 2016 election.

The DNC faced a difficult rebuilding period after divisions emerged between the more progressive members of the party who supported Sen. Bernie Sanders Bernie SandersNYT editorial board remembers Ginsburg: She 'will forever have two legacies' Two GOP governors urge Republicans to hold off on Supreme Court nominee Sanders knocks McConnell: He's going against Ginsburg's 'dying wishes' MORE (I-Vt.) in the Democratic primary and those who backed Clinton.

The group was also rocked by former DNC interim Chairwoman Donna Brazile's new book, in which she said she found fundraising information she said was proof that the Clinton campaign had rigged the primary in its favor. She later denied that the primary was rigged.

Perez and Sanders launched a unity tour after Perez was elected as DNC chair, and Perez tapped progressive Rep. Keith Ellison Keith Maurice EllisonOfficers in George Floyd's death appear in court, motion for separate trials Ex-Minneapolis officer involved in Floyd death asks judge to dismiss murder charge Over 50 current, former law enforcement professionals sign letter urging Congress to decriminalize marijuana MORE (D-Minn.), who also ran to lead the DNC, as vice chair.