Ed Martin, the pardon attorney in the justice department, emailed staff to say the probe will explore Biden's competence and if people were "taking advantage of him through use of

A senior official in Republican U.S. President Donald Trump's Justice Department told staff on Monday that he has been directed to investigate clemency granted by Democrat Joe Biden in the waning days of his presidency to members of his family and death row inmates.

Biden pardoned his siblings and their spouses, saying his family had been “subjected to unrelenting attacks and threats."