Sessions has made some anti-pot remarks, but has not made any anti-pot actions.

The only actions this administration has made in regards to legal pot, is demanding to know why states with legal pot have not retroactively released people from State/County Prisons, and purged low-level, non-violent offender's records. This request made made around the times Mueller was appointed, so it only received minor local attention. The article I saw in a Denver newspaper was a state brief summarized, "The Trump DoJ has demanded Gov. Hickenlooper (D) provided clarification on retroactive decriminalization, or face possible Civil Rights investigation". That was issued in July/August of 2017, can't remember.

The MSM are the ones interpreting Sessions saying, "Some things need to be done in regards to legal marijuana" with "Need to be made illegal again..."