Does the Fifth and Fourteenth Amendments' due process of law guarantee apply to criminal sentencing when a district court refuses to impose a legislatively mandated punishment?

Questions Presented 1. Does the Fifth and Fourteenth Amendments due process of law guarantee apply to the sentencing of a criminal defendant? 2. Where a district court refuses to impose a judgement upona criminal defendant that comports with the legislatively mandated ; punishment, required, to be imposed upon them for the crimes they are being sentenced for committing. Is it a violation of the Fifth and Fourteenth Amendments due process of law guarantee? i