Republicans and former President Trump's supporters aren’t the only people that have questioned President Biden’s mental fitness for office, as anti-Trump pundits, mainstream news organizations and longtime Democrats have expressed concern in recent months, too. Billionaire Bill Ackman, a longtime Democratic Party donor, put a spotlight on a recent video of former President Obama appearing to guide Biden off the stage at a recent campaign donor event.
The White House didn't immediately respond to a request for comment. Fox News Digital’s David Rutz, Matthew Richter, Kristine Parks and Joseph A. Wulfsohn contributed to this report.
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