If Van Jones, Sen. Cory Booker (D-NJ) and Kim Kardashian all agree on a bill, it’s probably not a good idea. Republicans and Democrats came together to pass the FIRST STEP Act into law this month, which will allow felons early release. It’s being touted as a criminal justice system overhaul, to let nonviolent offenders out of prison for good behavior. But as Senator Tom Cotton (R-Ark.), who graduated from Harvard Law School, observed, “there are almost no low-level, non-violent offenders in federal prison.” If they are in prison for low-level convictions, it’s because they were allowed to plea down to a...