Attorney General Jeff Sessions suggested in a press conference on Wedenesday that the Department of Justice is looking at changing Obama-era policies that allowed states to decide what to do about marijuana despite the drug remaining illegal under federal law, according to McClatchy DC.

Why it matters: This could have a huge impact on the 6 states and D.C. which will have legalized marijuana by January, 2018. Places that have already legalized marijuana and have seen the marijuana industry boom in their states could face particularly tricky legal situations.

Key quote: "In fact, we're looking at that very hard right now, we had a meeting yesterday and talked about it at some length. It's my view that the use of marijuana is detrimental, and we should not give encouragement in any way to it, and it represents a federal violation, which is in the law and is subject to being enforced."

Meanwhile, bipartisan groups of Senators and House members have been pushing for criminal justice reform bills, which would lower minimum mandatory sentences for non-violent drug crimes. A crackdown on drug crimes is not what they're looking for from Sessions.