In this April 12, 2018, photo, a marijuana plant awaits transplanting at the Hollingsworth Cannabis Company near Shelton, Wash. America's marijuana supporters have a lot to celebrate on this 420 holiday: Thirty states have legalized some form of medical marijuana, according to a national advocacy group. Nine of those states and Washington, D.C., also have broad legalization where adults 21 and older can use pot for any reason. Michigan could become the 10th state with its ballot initiative this year. Yet cannabis remains illegal under federal law, and it still has many opponents. (AP Photo/Ted S. Warren)