“As Bill Keller points out over at the Marshall Project, Trump can also undo Obama’s executive orders on juvenile solitary confinement, federal private prisons, “ban the box” and designating federal drug crimes a low-priority. These reforms were revolutionary in that Obama is the first president in a couple of generations to at least acknowledge that the criminal-justice system is in need of reform, other than simply making it “tougher on crime.” But in practice, they were all relatively modest. Still, Trump could undo them with the stroke of a pen. He could also undo or simply end much of the important but largely symbolic work the administration is doing on forensics reform.”