On November 18, 2022, Attorney General Merrick Garland appointed a special counsel to oversee the Justice Department's Trump investigations.
Garland gave two reasons for this appointment:
- Trump's announcement that he is a candidate for President in the 2024 election
- Biden's stated intention to be a candidate for President in the 2024 election
I understand reason #1, but I don't know why Biden running for re-election would be a reason to appoint a special counsel. Biden's presidency had not prevented the investigations from proceeding this year without a special counsel, so why would him stating his intention to run for re-election change that?