From a Washington Post story by Matt Viser headlined “Trump indictment thrusts Biden into unprecedented territory”:

The month before he was sworn into office, President Biden vowed to keep a significant distance between himself and any actions the Justice Department might take under his watch.

“I’m not going to be telling them what they have to do and don’t have to do,” he said in a CNN interview in December 2020. “I’m not going to be saying, ‘Go prosecute A, B or C.’ I’m not going to be telling them. That’s not the role. It’s not my Justice Department, it’s the people’s Justice Department.”