US President Donald Trump has ordered an investigation into what he called "conspiracy" to cover up former president Joe Biden's cognitive decline during his term.
"In recent months, it has become increasingly apparent that former President Biden's aides abused the power of presidential signatures through the use of an autopen to conceal Biden's cognitive decline," a presidential memorandum said.
"The American public was purposefully shielded from discovering who wielded the executive power, all while Biden's signature was deployed across thousands of documents to effect radical policy shifts," it added.
Trump and some other Republican politicians, as well as conservative US media, have long claimed this conspiracy, and it was been part of Trump's reelection campaign.
The claims became stronger during the presidential debate before the elections last year, where Biden appeared to stumble over words and kept losing his train of thought.
Recently, some Democrats have also begun to acknowledge that Biden was not as mentally present in recent years.
Biden, who is fighting cancer, has staunchly denied these allegations and said that these allegations are a distraction from Trump and the Republicans' attempts to push "disastrous legislation."
