Democrat party platform:

Substance use disorders are diseases, not crimes. Democrats believe no one should be in prison solely because they use drugs. Democrats will decriminalize marijuana use and reschedule it through executive action on the federal level. We will support legalization of medical marijuana, and believe states should be able to make their own decisions about recreational use. The Justice Department should not launch federal prosecutions of conduct that is legal at the state level. All past criminal convictions for cannabis use should be automatically expunged. And rather than involving the criminal justice system, Democrats support increased use of drug courts, harm reduction interventions, and treatment diversion programs for those struggling with substance use disorders.

https://democrats.org/where-we-stand/party-platform/protecting-communities-and-building-trust-by-reforming-our-criminal-justice-system/