President Joe Biden’s pardon decisions have come under a spotlight in the waning days of his presidency, but his openness to granting one unusual type of clemency has reignited legal debate.

Biden’s sweeping preemptive pardon for his son Hunter Biden and the president’s recent admissions that he is weighing similar pardons for some of President-elect Donald Trump’s top political adversaries, such as former Rep. Liz Cheney and Dr. Anthony Fauci, have left some questioning if they are appropriate.