On his last day in office, outgoing United States President Joe Biden issued a number of preemptive pardons essentially to protect some leading public figures and members of his own family from possible retaliation by Donald Trump. It was a novel and innovative use of the presidential pardon power.
Among others, the preemptive pardons were for:
retired General Mark Milley (former chair of the Joint Chiefs of Staff),
Anthony Fauci (Biden’s former chief medical advisor)
members of the House committee that investigated the January 6 2021 insurrection of the US Capitol, including Trump critic Liz Cheney (a former House member from Wyoming)
five members of his family, including his siblings.