President Donald Trump has directed the White House to probe Biden's executive actions, including pardons and the alleged use of an autopen for signatures, and if his officials sought to cover up evidence of mental decline, secretly governing in his stead.

Donald Trump has issued a Presidential Memorandum directing his administration to probe whether former President Joe Biden was truly in charge of the United States, or if key White House aides were involved in a "conspiracy" to usurp executive power due to his perceived "cognitive decline".