On New Year's Day, California joined the growing list of states and the District of Columbia where it is now legal to sell marijuana.While state and local leaders may see marijuana as a taxable cash crop, the Trump administration has a different point of view.On Thursday, Attorney General Jeff Sessions rescinded an Obama administration policy that discouraged federal prosecutors in most instances from bringing charges in places where marijuana is legal under state law.Joining me now from Washington, D.C., is John Hudak, the deputy director of the Center for Effective Public Management at the Brookings Institution, to help assess the impact of this move.So let's just, in plain English, what does the attorney general calling for?What the attorney general is calling for is the freeing up for U.S. attorneys,for federal prosecutors to start to go after state legal marijuana businesses who are complying with state law and are serving customers in states that have chosen to reform their marijuana laws.Something that the Obama administration put protections in against, the Trump administration is repealing that.And this was something the Attorney General Sessions said that he wasn't really going to take action on during his confirmation hearing, right?The attorney general has had a lot of mixed language when it comes to this issue.He's been cagey. There have been moments where he has suggested that he saw the standing policy as a good one, or one to keep in place,and there are other moments where you hear the attorney general using that type of “War on Drugs” language about marijuana