Joe Biden hasn’t officially declared, but to keep his options open he’s already apologized for his role in criminal justice policy in the 1980s and 1990s. “Kamala is a cop” has been deployed as an insult, though Sen. Kamala Harris (D-CA) assures voters that she is “taking full responsibility” for excesses as a prosecutor in California. Sen. Cory Booker (D-NJ), meanwhile, has earned plaudits from Vox for being the rare politician to express openness to shorter prison sentences, even for violent offenders.