There’s a huge backlog of asylum / deportation cases which means people stay in custody in racist and oppressive overcrowded prisons

Guess who can hire and fire the head of ICE and CPB? As the head of the executive, he is responsible for its actions, just as Trump was and Obama before him.

What should he do

Appoint a head of ICE that will fire every single officer, terminate every contract and sell off or destroy the assets before Republicans get in power again. Hunting down immigrants is an objective evil and ICE should not exist.