They say marijuana crimes are up, and blame it on pot coming from across the state border.Nine former Drug Enforcement Administrators, who filed a brief with the Court, agree. “The state of Colorado has created a dangerous gap in the federal drug control system enacted by the Unites States Congress,” Nebraska Assistant Attorney General Ryan Post told the Court. “This kind of not-in-my-backyard legal argument, if successful, could be deployed against any other states seeking to follow Colorado’s example and could therefore impose a massive obstacle to legalization at anything short of the federal level,” CNN analyst Prof. Stephen I. Vladeck told the cable TV network when the Court reached out for a recommendation last spring. Nationwide, momentum seems to be growing for legalized pot use, especially as states consider potential revenue they could collect on legal, taxable cannabis. The “War on Drugs” has done little to stop marijuana use, and many figure they might as well take financial advantage of what some say is a relatively low-risk drug. Recreational use is now legal in Washington, Oregon, Alaska, Colorado, and in the District of Columbia, and likely to come up in 2016 votes in a handful of other states, as well, such as California and Massachusetts. Opinion polls indicate that resistance to legalizing the drug is fading, especially among younger Americans. Some 58 percent of Americans say it should be legalized , including over 70 percent of young adults. As long as legalization is handled on a state-by-state basis, however, difficulties like Oklahoma and Nebraska’s are likely to continue to pop up. But some people say that treating individual states’ marijuana laws as experiments from whichthe rest of the nation can watch and learn is a wise move for now, especially as lessons are learned about its health effects. Legalizing pot is ” not an end-of-days disaster ,” the Brooking Institution’sJohn Hudak told The Christian Science Monitor in February, but not much else is certain. Right now, this is an exercise for the marijuana industry to make money, saidKevin Sabet, cofounder of the San Diego-based Smart Approaches to Marijuana (SAM), which opposes legalization. My biggest concern is that were creating Big Tobacco 2.0, and were allowing them to market a drug that has a big risk for the developing brain to young people. But others think that play-it-by-ear approach is unsustainable, as more and more states declare cannabis legal: “Somethings got to give, and its going to be federal prohibition,” theDrug Policy Alliance’sStephen Gutwillig predicted one year after Colorado gave pot users the go-ahead.