But experts say whether you're prosecuted will largely depend on where you live, because Sessions said Thursday he'll leave that decision up to each of the country's 93 USA attorneys.
California's days-old recreational use marijuana industry is facing an uncertain future, following the Trump administration's decision to rescind an Obama-era leniency policy that kept federal authorities from cracking down on the pot trade in states in which the drug is legal.
Senator Roger Wicker (R-Miss.) calls it a prudent step.
"Trump's approval rating is so low that I don't think he's stupid enough to mess with patients", said Millen, of Walled Lake, Mich.
Sessions' actions drew widespread rebuke from across the political spectrum Thursday.
"My phone's been ringing off the hook since 4 a.m. this morning, but at this point, we're going to operate as if it's business as usual", he said. "If I were an investor, and there are billions of dollars being invested, I would be nervous", Vitiello said.
With the new year brings new changes, including California becoming the sixth state with legalized recreational marijuana sales. "It really is quite a momentous occasion, and we are just so happy the state made a decision to go legal and regulate".
Robert Mikos, who teaches drug law at Vanderbilt University, said those with marijuana businesses need to pay attention to the signals sent from prosecutors.
The four-page memo, granting federal attorneys a great degree of prosecutorial discretion as to how to deploy their crime-fighting resources, has been a critical document in the growth of the legal marijuana industry. Congress should enact legislation that gives states the right to move ahead with recreational and/or medical marijuana laws if they choose.
Spokespeople for groups that voice concern about the commercialization and health impacts of marijuana said all medication should be approved by federal regulators before its sold. He equates the drug with heroin, has blamed pot for a rising tide of violence, and has said that medical use of marijuana has been "hyped, maybe too much".
But the AP also says that Sessions will leave it up to US Attorneys to decide whether to aggressively crack down on weed sales. Because adult use and medical marijuana must pass through a distributor before reaching a retailer, this will allow the company to safely and securely transport more cash and product for its major clients throughout the state.
A budtender assists a customer at the Higher Path medical marijuana dispensary in the San Fernando Valley area of Los Angeles in December.
The stage for Monday's grand opening was set when voters passed a ballot measure in November 2016, Proposition 64, immediately legalizing personal possession and use of recreational pot by adults 21 and over.
Reinforcing his historically anti-marijuana platform, U.S. Attorney General Jeff Sessions has opened the door for federal prosecutors to crack down on state-run marijuana operations.
The reaction from the top prosecutors in districts with legalized recreational marijuana has been mostly mild. Like Sicklick, he doesn't believe federal officials will crack down on states that have legalized medical pot.
According to Cy Scott, the founder of Headset, a marijuana data company, prices dropped in Washington's legal market from $50 to $15 for a gram of marijuana about 12 months after the first day of legal sales. Now cannabis is a cash only business because federal laws prohibit banking activity with illegal businesses. Nor does Moen think the DEA will ramp up marijuana enforcement, particularly given how closely the federal agents rely on their local and state partnerships in drug task forces.