The top artificial intelligence authority from the Trump administration stated on Tuesday that he has identified a Democratic U.S. senator who allegedly “controlled” the White House’s use of the autopen, which is now at the center of a growing scandal involving former President Joe Biden.

David Sacks, who serves as President Donald Trump’s AI advisor, told Fox News host Jesse Watters that he believes his investigation will reveal that one of the Senate’s most progressive voices is responsible for applying Biden’s artificial signature to numerous executive orders.

Trump has said he believes these orders should be invalidated as a result.

“Elizabeth Warren controlled the autopen during that administration,” said the Trump advisor, adding that the Massachusetts senator has a “pathological hatred of the crypto community” and wanted to “drive this community offshore.”

The two were discussing the future of cryptocurrency in the wake of President Donald Trump’s launch of a new token tied to his business ventures. On Friday, Trump hosted a lavish dinner at Mar-a-Lago attended by dozens of high-net-worth individuals who have made significant investments in the token.

Sacks did not explain why he believes Senator Warren was behind the widespread use of Biden’s autopen—a device that produces facsimile signatures for busy officials, including governors and heads of state. Traditionally, autopens have been reserved for less urgent documents, such as resolutions or presidential proclamations.

However, among Biden’s final acts in office were pardons granted to members of the contentious January 6 select committee, including former Congresswoman Liz Cheney. Trump has challenged the validity of these pardons, alleging that they were signed using an autopen rather than by hand, and perhaps without Biden’s knowledge.

“Crooked Joe Biden got us into a real mess with Russia and everything else he did, frankly. But he didn’t know about it and he, generally speaking, signed it with autopen, so how would he know that autopen is a big deal,” Trump said in a speech at the Department of Justice on Friday, the Daily Mail reported.

“When my people come up” to have him sign an executive order, Trump said “you don’t use autopen.”

“Number one – it’s disrespectful to the office,” he claimed. “Number two – maybe it’s not even valid because who’s getting him to sign? He had no idea what the hell he was doing.”

The extensive use of Biden’s autopen was uncovered by the Oversight Project, a division of the conservative Heritage Foundation. The group has submitted public records requests aiming to expose attempts to conceal Biden’s mental health decline during his final year in office.

“WHOEVER CONTROLLED THE AUTOPEN CONTROLLED THE PRESIDENCY,” the group wrote on X last week.

“We gathered every document we could find with Biden’s signature over the course of his presidency. All used the same autopen signature except for the announcement that the former President was dropping out of the race last year,” the group added.

House Oversight Chair James Comer (R-KY) announced last week that he has sent requests for testimony to dozens of former Biden staffers and confidants. If they don’t comply, he warned, they could face subpoenas very soon compelling them to do so.

“If we don’t hear anything from them in a week, then I would expect to start seeing subpoenas,” he said.

Ed Martin, the incoming pardon attorney at the Department of Justice and head of the DOJ’s Weaponization Working Group, announced last week that he is investigating the questionable use of the presidential autopen for Biden’s last-minute controversial pardons.

Martin confirmed that the investigation into the autopen’s use has been active for some time, that he has contacted members of the Biden family, that several individuals of interest have retained legal counsel, and that a whistleblower has already come forward with serious allegations.