Should defendants in criminal cases be permitted to confront witnesses against them at sentencing when their uncorroborated hearsay statements are solely responsible for increasing sentencing guidelines?

QUESTIONS PRESENTED 1. Should defendants in criminal cases be permitted to confront witnesses against them at sentencing when their uncorroborated hearsay statements are solely responsible for increasing sentencing guidelines? 2. Does it violate the principles of due process for a sentencing court to adopt a drug quantity based on relevant conduct as calculated in a Presentence Investigation Report without conducting any on the record inquiry into the rebuttal evidence provided by the defendant?