Facebook CEO Mark Zuckerberg and his wife, Priscilla Chan, have hired a top Democratic pollster to conduct research for their charity, further fueling speculation that Zuckerberg has Oval Office ambitions.

Joel Benenson was the chief strategist for both of Barack Obama’s presidential campaigns as well as Hillary Clinton’s failed presidential campaign.

The Chan Zuckerberg Initiative has hired Benenson’s company, Benenson Strategy Group, according to Politico. The consulting firm has previously worked for the American Civil Liberties Union and Lady Gaga’s Born This Way Foundation.

Following the birth of their son in December 2015, Zuckerberg and Chan vowed to give away 99 percent of their fortune — worth an estimated $45 billion — to charity.

The couple previously hired David Plouffe, Obama’s campaign manager for his 2008 presidential run, to serve as the philanthropy’s president of policy and advocacy.

Earlier this year they also brought on Amy Dudley, a former communications adviser to Virginia Senator Tim Kaine. Ken Mehlman, who ran President George W. Bush’s 2004 reelection campaign, also sits on the charity’s board.

And Zuckerberg’s personal photographer, Charles Ommanney, was the photographer to George W. Bush and Obama’s presidential campaigns.

In January, Zuckerberg announced that his 2017 New Year’s resolution was to visit all 50 states – kicking off speculation that he’s gunning for a presidential run in 2020 — despite his denials. He’s since road tripped through Iowa, toured a Ford assembly plant near Detroit, and visited Dayton, Ohio, all considered key campaign stops.

“Some of you have asked if this challenge means I’m running for public office,” he wrote on his Facebook page in May. “I’m not.”